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Finding the Fourth Proportional to 529,387.71, 730,554.49 and 287,669.71

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Solution

The fourth proportional to 529,387.71, 730,554.49 and 287,669.71 is: 396,983.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    529,387.71 : 730,554.49 = 287,669.71 : x
  2. Step 2: Convert to fraction form
    529,387.71/730,554.49 = 287,669.71/x
  3. Step 3: Cross multiply
    529,387.71x = 730,554.49 × 287,669.71
  4. Step 4: Simplify right side
    529,387.71x = 210,158,396,839.15
  5. Step 5: Solve for x
    x = 210,158,396,839.15/529,387.71
  6. Step 6: Final answer
    x = 396,983.90

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1.5x scale

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.