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Finding the Fourth Proportional to 389,301.80, 584,147.10 and 220,951.40

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Solution

The fourth proportional to 389,301.80, 584,147.10 and 220,951.40 is: 331,537.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    389,301.80 : 584,147.10 = 220,951.40 : x
  2. Step 2: Convert to fraction form
    389,301.80/584,147.10 = 220,951.40/x
  3. Step 3: Cross multiply
    389,301.80x = 584,147.10 × 220,951.40
  4. Step 4: Simplify right side
    389,301.80x = 129,068,119,550.94
  5. Step 5: Solve for x
    x = 129,068,119,550.94/389,301.80
  6. Step 6: Final answer
    x = 331,537.43

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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.