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Finding the Fourth Proportional to 316.54, 472.12 and 272.71

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Solution

The fourth proportional to 316.54, 472.12 and 272.71 is: 406.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    316.54 : 472.12 = 272.71 : x
  2. Step 2: Convert to fraction form
    316.54/472.12 = 272.71/x
  3. Step 3: Cross multiply
    316.54x = 472.12 × 272.71
  4. Step 4: Simplify right side
    316.54x = 128,751.85
  5. Step 5: Solve for x
    x = 128,751.85/316.54
  6. Step 6: Final answer
    x = 406.75

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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.