Home / 1,216,566,119.45-1,678,894,256.37-688,009,145.51

Finding the Fourth Proportional to 1,216,566,119.45, 1,678,894,256.37 and 688,009,145.51

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Solution

The fourth proportional to 1,216,566,119.45, 1,678,894,256.37 and 688,009,145.51 is: 949,471,289.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,216,566,119.45 : 1,678,894,256.37 = 688,009,145.51 : x
  2. Step 2: Convert to fraction form
    1,216,566,119.45/1,678,894,256.37 = 688,009,145.51/x
  3. Step 3: Cross multiply
    1,216,566,119.45x = 1,678,894,256.37 × 688,009,145.51
  4. Step 4: Simplify right side
    1,216,566,119.45x = 1,155,094,602,718,375,936
  5. Step 5: Solve for x
    x = 1,155,094,602,718,375,936/1,216,566,119.45
  6. Step 6: Final answer
    x = 949,471,289.93

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Half scale
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Double scale
Find fourth proportional to 1,216,566,120.45, 1,678,894,257.75 and 688,009,146.51
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.