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Finding the Fourth Proportional to 526,726.28, 726,755.40 and 319,988.66

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Solution

The fourth proportional to 526,726.28, 726,755.40 and 319,988.66 is: 441,507.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    526,726.28 : 726,755.40 = 319,988.66 : x
  2. Step 2: Convert to fraction form
    526,726.28/726,755.40 = 319,988.66/x
  3. Step 3: Cross multiply
    526,726.28x = 726,755.40 × 319,988.66
  4. Step 4: Simplify right side
    526,726.28x = 232,553,486,593.76
  5. Step 5: Solve for x
    x = 232,553,486,593.76/526,726.28
  6. Step 6: Final answer
    x = 441,507.28

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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.