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Finding the Fourth Proportional to 1,373.78, 2,061.10 and 449.35

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Solution

The fourth proportional to 1,373.78, 2,061.10 and 449.35 is: 674.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,373.78 : 2,061.10 = 449.35 : x
  2. Step 2: Convert to fraction form
    1,373.78/2,061.10 = 449.35/x
  3. Step 3: Cross multiply
    1,373.78x = 2,061.10 × 449.35
  4. Step 4: Simplify right side
    1,373.78x = 926,150.69
  5. Step 5: Solve for x
    x = 926,150.69/1,373.78
  6. Step 6: Final answer
    x = 674.16

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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.