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Finding the Fourth Proportional to 209.97, 315.15 and 151.46

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Solution

The fourth proportional to 209.97, 315.15 and 151.46 is: 227.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    209.97 : 315.15 = 151.46 : x
  2. Step 2: Convert to fraction form
    209.97/315.15 = 151.46/x
  3. Step 3: Cross multiply
    209.97x = 315.15 × 151.46
  4. Step 4: Simplify right side
    209.97x = 47,731.86
  5. Step 5: Solve for x
    x = 47,731.86/209.97
  6. Step 6: Final answer
    x = 227.33

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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.