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Finding the Fourth Proportional to 423.39, 635.10 and 115.23

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Solution

The fourth proportional to 423.39, 635.10 and 115.23 is: 172.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    423.39 : 635.10 = 115.23 : x
  2. Step 2: Convert to fraction form
    423.39/635.10 = 115.23/x
  3. Step 3: Cross multiply
    423.39x = 635.10 × 115.23
  4. Step 4: Simplify right side
    423.39x = 73,182.57
  5. Step 5: Solve for x
    x = 73,182.57/423.39
  6. Step 6: Final answer
    x = 172.85

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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.