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Finding the Fourth Proportional to 5,149.86, 7,725.33 and 1,687.38

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Solution

The fourth proportional to 5,149.86, 7,725.33 and 1,687.38 is: 2,531.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,149.86 : 7,725.33 = 1,687.38 : x
  2. Step 2: Convert to fraction form
    5,149.86/7,725.33 = 1,687.38/x
  3. Step 3: Cross multiply
    5,149.86x = 7,725.33 × 1,687.38
  4. Step 4: Simplify right side
    5,149.86x = 13,035,567.34
  5. Step 5: Solve for x
    x = 13,035,567.34/5,149.86
  6. Step 6: Final answer
    x = 2,531.25

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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.