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Finding the Fourth Proportional to 529,357.56, 730,511.84 and 287,640.87

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Solution

The fourth proportional to 529,357.56, 730,511.84 and 287,640.87 is: 396,943.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    529,357.56 : 730,511.84 = 287,640.87 : x
  2. Step 2: Convert to fraction form
    529,357.56/730,511.84 = 287,640.87/x
  3. Step 3: Cross multiply
    529,357.56x = 730,511.84 × 287,640.87
  4. Step 4: Simplify right side
    529,357.56x = 210,125,059,764.70
  5. Step 5: Solve for x
    x = 210,125,059,764.70/529,357.56
  6. Step 6: Final answer
    x = 396,943.53

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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.