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Finding the Fourth Proportional to 529,375.40, 730,542.47 and 287,657.96

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Solution

The fourth proportional to 529,375.40, 730,542.47 and 287,657.96 is: 396,970.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    529,375.40 : 730,542.47 = 287,657.96 : x
  2. Step 2: Convert to fraction form
    529,375.40/730,542.47 = 287,657.96/x
  3. Step 3: Cross multiply
    529,375.40x = 730,542.47 × 287,657.96
  4. Step 4: Simplify right side
    529,375.40x = 210,146,357,001.63
  5. Step 5: Solve for x
    x = 210,146,357,001.63/529,375.40
  6. Step 6: Final answer
    x = 396,970.39

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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.