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Finding the Fourth Proportional to 521,637.97, 781,300.91 and 400,805.53

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Solution

The fourth proportional to 521,637.97, 781,300.91 and 400,805.53 is: 600,320.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    521,637.97 : 781,300.91 = 400,805.53 : x
  2. Step 2: Convert to fraction form
    521,637.97/781,300.91 = 400,805.53/x
  3. Step 3: Cross multiply
    521,637.97x = 781,300.91 × 400,805.53
  4. Step 4: Simplify right side
    521,637.97x = 313,149,721,415.53
  5. Step 5: Solve for x
    x = 313,149,721,415.53/521,637.97
  6. Step 6: Final answer
    x = 600,320.04

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.