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Finding the Fourth Proportional to 642,049.80, 963,468.36 and 287,363.76

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Solution

The fourth proportional to 642,049.80, 963,468.36 and 287,363.76 is: 431,221.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    642,049.80 : 963,468.36 = 287,363.76 : x
  2. Step 2: Convert to fraction form
    642,049.80/963,468.36 = 287,363.76/x
  3. Step 3: Cross multiply
    642,049.80x = 963,468.36 × 287,363.76
  4. Step 4: Simplify right side
    642,049.80x = 276,865,890,570.63
  5. Step 5: Solve for x
    x = 276,865,890,570.63/642,049.80
  6. Step 6: Final answer
    x = 431,221.83

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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.