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Finding the Fourth Proportional to 1,687.56, 2,531.34 and 591.99

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Solution

The fourth proportional to 1,687.56, 2,531.34 and 591.99 is: 887.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,687.56 : 2,531.34 = 591.99 : x
  2. Step 2: Convert to fraction form
    1,687.56/2,531.34 = 591.99/x
  3. Step 3: Cross multiply
    1,687.56x = 2,531.34 × 591.99
  4. Step 4: Simplify right side
    1,687.56x = 1,498,527.97
  5. Step 5: Solve for x
    x = 1,498,527.97/1,687.56
  6. Step 6: Final answer
    x = 887.99

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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.