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Finding the Fourth Proportional to 308.24, 425.21 and 220.76

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Solution

The fourth proportional to 308.24, 425.21 and 220.76 is: 304.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    308.24 : 425.21 = 220.76 : x
  2. Step 2: Convert to fraction form
    308.24/425.21 = 220.76/x
  3. Step 3: Cross multiply
    308.24x = 425.21 × 220.76
  4. Step 4: Simplify right side
    308.24x = 93,869.36
  5. Step 5: Solve for x
    x = 93,869.36/308.24
  6. Step 6: Final answer
    x = 304.53

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Find fourth proportional to 154.12, 212.61 and 110.38
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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.