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Finding the Fourth Proportional to 2,459.75, 3,690.24 and 728.38

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Solution

The fourth proportional to 2,459.75, 3,690.24 and 728.38 is: 1,092.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,459.75 : 3,690.24 = 728.38 : x
  2. Step 2: Convert to fraction form
    2,459.75/3,690.24 = 728.38/x
  3. Step 3: Cross multiply
    2,459.75x = 3,690.24 × 728.38
  4. Step 4: Simplify right side
    2,459.75x = 2,687,874.92
  5. Step 5: Solve for x
    x = 2,687,874.92/2,459.75
  6. Step 6: Final answer
    x = 1,092.74

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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.