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Finding the Fourth Proportional to 218.76, 301.80 and 191.13

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Solution

The fourth proportional to 218.76, 301.80 and 191.13 is: 263.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    218.76 : 301.80 = 191.13 : x
  2. Step 2: Convert to fraction form
    218.76/301.80 = 191.13/x
  3. Step 3: Cross multiply
    218.76x = 301.80 × 191.13
  4. Step 4: Simplify right side
    218.76x = 57,683.03
  5. Step 5: Solve for x
    x = 57,683.03/218.76
  6. Step 6: Final answer
    x = 263.68

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Find fourth proportional to 109.38, 150.90 and 95.57
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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.