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Finding the Fourth Proportional to 529,178.87, 730,272.03 and 287,463.40

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Solution

The fourth proportional to 529,178.87, 730,272.03 and 287,463.40 is: 396,702.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    529,178.87 : 730,272.03 = 287,463.40 : x
  2. Step 2: Convert to fraction form
    529,178.87/730,272.03 = 287,463.40/x
  3. Step 3: Cross multiply
    529,178.87x = 730,272.03 × 287,463.40
  4. Step 4: Simplify right side
    529,178.87x = 209,926,477,017.34
  5. Step 5: Solve for x
    x = 209,926,477,017.34/529,178.87
  6. Step 6: Final answer
    x = 396,702.30

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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.