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Finding the Fourth Proportional to 521,899.97, 720,209.75 and 307,053.86

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Solution

The fourth proportional to 521,899.97, 720,209.75 and 307,053.86 is: 423,727.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    521,899.97 : 720,209.75 = 307,053.86 : x
  2. Step 2: Convert to fraction form
    521,899.97/720,209.75 = 307,053.86/x
  3. Step 3: Cross multiply
    521,899.97x = 720,209.75 × 307,053.86
  4. Step 4: Simplify right side
    521,899.97x = 221,143,178,610.82
  5. Step 5: Solve for x
    x = 221,143,178,610.82/521,899.97
  6. Step 6: Final answer
    x = 423,727.14

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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.