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Finding the Fourth Proportional to 210.38, 316.14 and 112.95

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Solution

The fourth proportional to 210.38, 316.14 and 112.95 is: 169.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    210.38 : 316.14 = 112.95 : x
  2. Step 2: Convert to fraction form
    210.38/316.14 = 112.95/x
  3. Step 3: Cross multiply
    210.38x = 316.14 × 112.95
  4. Step 4: Simplify right side
    210.38x = 35,707.45
  5. Step 5: Solve for x
    x = 35,707.45/210.38
  6. Step 6: Final answer
    x = 169.73

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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.