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Finding the Fourth Proportional to 316.49, 472.19 and 270.86

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Solution

The fourth proportional to 316.49, 472.19 and 270.86 is: 404.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    316.49 : 472.19 = 270.86 : x
  2. Step 2: Convert to fraction form
    316.49/472.19 = 270.86/x
  3. Step 3: Cross multiply
    316.49x = 472.19 × 270.86
  4. Step 4: Simplify right side
    316.49x = 127,893.67
  5. Step 5: Solve for x
    x = 127,893.67/316.49
  6. Step 6: Final answer
    x = 404.11

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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.