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Finding the Fourth Proportional to 1,374.28, 2,061.65 and 449.57

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Solution

The fourth proportional to 1,374.28, 2,061.65 and 449.57 is: 674.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,374.28 : 2,061.65 = 449.57 : x
  2. Step 2: Convert to fraction form
    1,374.28/2,061.65 = 449.57/x
  3. Step 3: Cross multiply
    1,374.28x = 2,061.65 × 449.57
  4. Step 4: Simplify right side
    1,374.28x = 926,862.27
  5. Step 5: Solve for x
    x = 926,862.27/1,374.28
  6. Step 6: Final answer
    x = 674.44

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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.