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Finding the Fourth Proportional to 447.16, 617.68 and 372.72

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Solution

The fourth proportional to 447.16, 617.68 and 372.72 is: 514.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    447.16 : 617.68 = 372.72 : x
  2. Step 2: Convert to fraction form
    447.16/617.68 = 372.72/x
  3. Step 3: Cross multiply
    447.16x = 617.68 × 372.72
  4. Step 4: Simplify right side
    447.16x = 230,220.36
  5. Step 5: Solve for x
    x = 230,220.36/447.16
  6. Step 6: Final answer
    x = 514.85

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.