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Finding the Fourth Proportional to 423.49, 635.48 and 149.79

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Solution

The fourth proportional to 423.49, 635.48 and 149.79 is: 224.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    423.49 : 635.48 = 149.79 : x
  2. Step 2: Convert to fraction form
    423.49/635.48 = 149.79/x
  3. Step 3: Cross multiply
    423.49x = 635.48 × 149.79
  4. Step 4: Simplify right side
    423.49x = 95,188.55
  5. Step 5: Solve for x
    x = 95,188.55/423.49
  6. Step 6: Final answer
    x = 224.77

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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.