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Finding the Fourth Proportional to 642,281.46, 963,189.54 and 215,689.66

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Solution

The fourth proportional to 642,281.46, 963,189.54 and 215,689.66 is: 323,456.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    642,281.46 : 963,189.54 = 215,689.66 : x
  2. Step 2: Convert to fraction form
    642,281.46/963,189.54 = 215,689.66/x
  3. Step 3: Cross multiply
    642,281.46x = 963,189.54 × 215,689.66
  4. Step 4: Simplify right side
    642,281.46x = 207,750,024,398.16
  5. Step 5: Solve for x
    x = 207,750,024,398.16/642,281.46
  6. Step 6: Final answer
    x = 323,456.36

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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.