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Finding the Fourth Proportional to 614.16, 918.72 and 449.04

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Solution

The fourth proportional to 614.16, 918.72 and 449.04 is: 671.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    614.16 : 918.72 = 449.04 : x
  2. Step 2: Convert to fraction form
    614.16/918.72 = 449.04/x
  3. Step 3: Cross multiply
    614.16x = 918.72 × 449.04
  4. Step 4: Simplify right side
    614.16x = 412,542.03
  5. Step 5: Solve for x
    x = 412,542.03/614.16
  6. Step 6: Final answer
    x = 671.72

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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.