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Finding the Fourth Proportional to 1,374.05, 2,061.15 and 449.66

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Solution

The fourth proportional to 1,374.05, 2,061.15 and 449.66 is: 674.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,374.05 : 2,061.15 = 449.66 : x
  2. Step 2: Convert to fraction form
    1,374.05/2,061.15 = 449.66/x
  3. Step 3: Cross multiply
    1,374.05x = 2,061.15 × 449.66
  4. Step 4: Simplify right side
    1,374.05x = 926,820.18
  5. Step 5: Solve for x
    x = 926,820.18/1,374.05
  6. Step 6: Final answer
    x = 674.52

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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.