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Finding the Fourth Proportional to 389,640.60, 584,691.30 and 284,194.20

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Solution

The fourth proportional to 389,640.60, 584,691.30 and 284,194.20 is: 426,459.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    389,640.60 : 584,691.30 = 284,194.20 : x
  2. Step 2: Convert to fraction form
    389,640.60/584,691.30 = 284,194.20/x
  3. Step 3: Cross multiply
    389,640.60x = 584,691.30 × 284,194.20
  4. Step 4: Simplify right side
    389,640.60x = 166,165,876,250.46
  5. Step 5: Solve for x
    x = 166,165,876,250.46/389,640.60
  6. Step 6: Final answer
    x = 426,459.35

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.