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Finding the Fourth Proportional to 1,591.47, 2,385.12 and 1,487.79

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Solution

The fourth proportional to 1,591.47, 2,385.12 and 1,487.79 is: 2,229.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,591.47 : 2,385.12 = 1,487.79 : x
  2. Step 2: Convert to fraction form
    1,591.47/2,385.12 = 1,487.79/x
  3. Step 3: Cross multiply
    1,591.47x = 2,385.12 × 1,487.79
  4. Step 4: Simplify right side
    1,591.47x = 3,548,557.68
  5. Step 5: Solve for x
    x = 3,548,557.68/1,591.47
  6. Step 6: Final answer
    x = 2,229.74

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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.