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Finding the Fourth Proportional to 311.06, 463.88 and 272.72

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Solution

The fourth proportional to 311.06, 463.88 and 272.72 is: 406.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    311.06 : 463.88 = 272.72 : x
  2. Step 2: Convert to fraction form
    311.06/463.88 = 272.72/x
  3. Step 3: Cross multiply
    311.06x = 463.88 × 272.72
  4. Step 4: Simplify right side
    311.06x = 126,509.35
  5. Step 5: Solve for x
    x = 126,509.35/311.06
  6. Step 6: Final answer
    x = 406.70

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.