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Finding the Fourth Proportional to 210.56, 316.00 and 113.14

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Solution

The fourth proportional to 210.56, 316.00 and 113.14 is: 169.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    210.56 : 316.00 = 113.14 : x
  2. Step 2: Convert to fraction form
    210.56/316.00 = 113.14/x
  3. Step 3: Cross multiply
    210.56x = 316.00 × 113.14
  4. Step 4: Simplify right side
    210.56x = 35,751.17
  5. Step 5: Solve for x
    x = 35,751.17/210.56
  6. Step 6: Final answer
    x = 169.79

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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.