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Finding the Fourth Proportional to 423.66, 635.78 and 149.76

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Solution

The fourth proportional to 423.66, 635.78 and 149.76 is: 224.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    423.66 : 635.78 = 149.76 : x
  2. Step 2: Convert to fraction form
    423.66/635.78 = 149.76/x
  3. Step 3: Cross multiply
    423.66x = 635.78 × 149.76
  4. Step 4: Simplify right side
    423.66x = 95,214.41
  5. Step 5: Solve for x
    x = 95,214.41/423.66
  6. Step 6: Final answer
    x = 224.74

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.