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Finding the Fourth Proportional to 529,626.47, 730,875.92 and 287,915.13

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Solution

The fourth proportional to 529,626.47, 730,875.92 and 287,915.13 is: 397,318.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    529,626.47 : 730,875.92 = 287,915.13 : x
  2. Step 2: Convert to fraction form
    529,626.47/730,875.92 = 287,915.13/x
  3. Step 3: Cross multiply
    529,626.47x = 730,875.92 × 287,915.13
  4. Step 4: Simplify right side
    529,626.47x = 210,430,238,161.09
  5. Step 5: Solve for x
    x = 210,430,238,161.09/529,626.47
  6. Step 6: Final answer
    x = 397,318.20

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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.