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Finding the Fourth Proportional to 216.76, 299.14 and 133.92

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Solution

The fourth proportional to 216.76, 299.14 and 133.92 is: 184.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    216.76 : 299.14 = 133.92 : x
  2. Step 2: Convert to fraction form
    216.76/299.14 = 133.92/x
  3. Step 3: Cross multiply
    216.76x = 299.14 × 133.92
  4. Step 4: Simplify right side
    216.76x = 40,060.83
  5. Step 5: Solve for x
    x = 40,060.83/216.76
  6. Step 6: Final answer
    x = 184.82

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Find fourth proportional to 108.38, 149.57 and 66.96
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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.