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Finding the Fourth Proportional to 316.43, 474.65 and 267.21

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Solution

The fourth proportional to 316.43, 474.65 and 267.21 is: 400.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    316.43 : 474.65 = 267.21 : x
  2. Step 2: Convert to fraction form
    316.43/474.65 = 267.21/x
  3. Step 3: Cross multiply
    316.43x = 474.65 × 267.21
  4. Step 4: Simplify right side
    316.43x = 126,829.89
  5. Step 5: Solve for x
    x = 126,829.89/316.43
  6. Step 6: Final answer
    x = 400.82

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.