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Finding the Fourth Proportional to 316.76, 437.24 and 218.76

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Solution

The fourth proportional to 316.76, 437.24 and 218.76 is: 301.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    316.76 : 437.24 = 218.76 : x
  2. Step 2: Convert to fraction form
    316.76/437.24 = 218.76/x
  3. Step 3: Cross multiply
    316.76x = 437.24 × 218.76
  4. Step 4: Simplify right side
    316.76x = 95,650.62
  5. Step 5: Solve for x
    x = 95,650.62/316.76
  6. Step 6: Final answer
    x = 301.97

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Find fourth proportional to 158.38, 218.62 and 109.38
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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.