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Finding the Fourth Proportional to 529,145.88, 730,234.49 and 287,428.38

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Solution

The fourth proportional to 529,145.88, 730,234.49 and 287,428.38 is: 396,658.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    529,145.88 : 730,234.49 = 287,428.38 : x
  2. Step 2: Convert to fraction form
    529,145.88/730,234.49 = 287,428.38/x
  3. Step 3: Cross multiply
    529,145.88x = 730,234.49 × 287,428.38
  4. Step 4: Simplify right side
    529,145.88x = 209,890,115,043.68
  5. Step 5: Solve for x
    x = 209,890,115,043.68/529,145.88
  6. Step 6: Final answer
    x = 396,658.32

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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.