Home / 521,953,331.92-720,316,351.56-287,023,253.20

Finding the Fourth Proportional to 521,953,331.92, 720,316,351.56 and 287,023,253.20

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Solution

The fourth proportional to 521,953,331.92, 720,316,351.56 and 287,023,253.20 is: 396,103,501.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    521,953,331.92 : 720,316,351.56 = 287,023,253.20 : x
  2. Step 2: Convert to fraction form
    521,953,331.92/720,316,351.56 = 287,023,253.20/x
  3. Step 3: Cross multiply
    521,953,331.92x = 720,316,351.56 × 287,023,253.20
  4. Step 4: Simplify right side
    521,953,331.92x = 206,747,542,557,906,080
  5. Step 5: Solve for x
    x = 206,747,542,557,906,080/521,953,331.92
  6. Step 6: Final answer
    x = 396,103,501.82

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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.