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Finding the Fourth Proportional to 331.65, 497.55 and 115.23

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Solution

The fourth proportional to 331.65, 497.55 and 115.23 is: 172.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    331.65 : 497.55 = 115.23 : x
  2. Step 2: Convert to fraction form
    331.65/497.55 = 115.23/x
  3. Step 3: Cross multiply
    331.65x = 497.55 × 115.23
  4. Step 4: Simplify right side
    331.65x = 57,332.69
  5. Step 5: Solve for x
    x = 57,332.69/331.65
  6. Step 6: Final answer
    x = 172.87

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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.