Home / 1,388,986.16-1,916,875.13-777,102.28

Finding the Fourth Proportional to 1,388,986.16, 1,916,875.13 and 777,102.28

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Solution

The fourth proportional to 1,388,986.16, 1,916,875.13 and 777,102.28 is: 1,072,442.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,388,986.16 : 1,916,875.13 = 777,102.28 : x
  2. Step 2: Convert to fraction form
    1,388,986.16/1,916,875.13 = 777,102.28/x
  3. Step 3: Cross multiply
    1,388,986.16x = 1,916,875.13 × 777,102.28
  4. Step 4: Simplify right side
    1,388,986.16x = 1,489,608,025,320.60
  5. Step 5: Solve for x
    x = 1,489,608,025,320.60/1,388,986.16
  6. Step 6: Final answer
    x = 1,072,442.67

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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.