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Finding the Fourth Proportional to 502,356.13, 693,235.45 and 287,491.59

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Solution

The fourth proportional to 502,356.13, 693,235.45 and 287,491.59 is: 396,729.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    502,356.13 : 693,235.45 = 287,491.59 : x
  2. Step 2: Convert to fraction form
    502,356.13/693,235.45 = 287,491.59/x
  3. Step 3: Cross multiply
    502,356.13x = 693,235.45 × 287,491.59
  4. Step 4: Simplify right side
    502,356.13x = 199,299,361,764.87
  5. Step 5: Solve for x
    x = 199,299,361,764.87/502,356.13
  6. Step 6: Final answer
    x = 396,729.23

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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.