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Finding the Fourth Proportional to 1,687.35, 2,532.15 and 591.71

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Solution

The fourth proportional to 1,687.35, 2,532.15 and 591.71 is: 887.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,687.35 : 2,532.15 = 591.71 : x
  2. Step 2: Convert to fraction form
    1,687.35/2,532.15 = 591.71/x
  3. Step 3: Cross multiply
    1,687.35x = 2,532.15 × 591.71
  4. Step 4: Simplify right side
    1,687.35x = 1,498,285.82
  5. Step 5: Solve for x
    x = 1,498,285.82/1,687.35
  6. Step 6: Final answer
    x = 887.95

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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.