Home / 1,216,295,258.64-1,678,422,812.04-687,627,636.72

Finding the Fourth Proportional to 1,216,295,258.64, 1,678,422,812.04 and 687,627,636.72

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Solution

The fourth proportional to 1,216,295,258.64, 1,678,422,812.04 and 687,627,636.72 is: 948,889,591.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,216,295,258.64 : 1,678,422,812.04 = 687,627,636.72 : x
  2. Step 2: Convert to fraction form
    1,216,295,258.64/1,678,422,812.04 = 687,627,636.72/x
  3. Step 3: Cross multiply
    1,216,295,258.64x = 1,678,422,812.04 × 687,627,636.72
  4. Step 4: Simplify right side
    1,216,295,258.64x = 1,154,129,911,660,002,048
  5. Step 5: Solve for x
    x = 1,154,129,911,660,002,048/1,216,295,258.64
  6. Step 6: Final answer
    x = 948,889,591.95

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Double scale
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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.