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Finding the Fourth Proportional to 447.30, 616.95 and 272.70

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Solution

The fourth proportional to 447.30, 616.95 and 272.70 is: 376.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    447.30 : 616.95 = 272.70 : x
  2. Step 2: Convert to fraction form
    447.30/616.95 = 272.70/x
  3. Step 3: Cross multiply
    447.30x = 616.95 × 272.70
  4. Step 4: Simplify right side
    447.30x = 168,242.27
  5. Step 5: Solve for x
    x = 168,242.27/447.30
  6. Step 6: Final answer
    x = 376.13

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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.