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Finding the Fourth Proportional to 316.97, 475.45 and 209.24

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Solution

The fourth proportional to 316.97, 475.45 and 209.24 is: 313.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    316.97 : 475.45 = 209.24 : x
  2. Step 2: Convert to fraction form
    316.97/475.45 = 209.24/x
  3. Step 3: Cross multiply
    316.97x = 475.45 × 209.24
  4. Step 4: Simplify right side
    316.97x = 99,483.16
  5. Step 5: Solve for x
    x = 99,483.16/316.97
  6. Step 6: Final answer
    x = 313.86

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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.