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Finding the Fourth Proportional to 5,149.89, 7,724.88 and 1,687.14

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Solution

The fourth proportional to 5,149.89, 7,724.88 and 1,687.14 is: 2,530.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,149.89 : 7,724.88 = 1,687.14 : x
  2. Step 2: Convert to fraction form
    5,149.89/7,724.88 = 1,687.14/x
  3. Step 3: Cross multiply
    5,149.89x = 7,724.88 × 1,687.14
  4. Step 4: Simplify right side
    5,149.89x = 13,032,954.04
  5. Step 5: Solve for x
    x = 13,032,954.04/5,149.89
  6. Step 6: Final answer
    x = 2,530.72

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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.