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Finding the Fourth Proportional to 529,359.97, 730,521.38 and 287,642.53

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Solution

The fourth proportional to 529,359.97, 730,521.38 and 287,642.53 is: 396,949.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    529,359.97 : 730,521.38 = 287,642.53 : x
  2. Step 2: Convert to fraction form
    529,359.97/730,521.38 = 287,642.53/x
  3. Step 3: Cross multiply
    529,359.97x = 730,521.38 × 287,642.53
  4. Step 4: Simplify right side
    529,359.97x = 210,129,020,342.19
  5. Step 5: Solve for x
    x = 210,129,020,342.19/529,359.97
  6. Step 6: Final answer
    x = 396,949.21

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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.