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Finding the Fourth Proportional to 217.68, 300.36 and 134.76

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Solution

The fourth proportional to 217.68, 300.36 and 134.76 is: 185.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    217.68 : 300.36 = 134.76 : x
  2. Step 2: Convert to fraction form
    217.68/300.36 = 134.76/x
  3. Step 3: Cross multiply
    217.68x = 300.36 × 134.76
  4. Step 4: Simplify right side
    217.68x = 40,476.51
  5. Step 5: Solve for x
    x = 40,476.51/217.68
  6. Step 6: Final answer
    x = 185.95

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Find fourth proportional to 108.84, 150.18 and 67.38
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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.