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Finding the Fourth Proportional to 331.65, 497.70 and 148.95

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Solution

The fourth proportional to 331.65, 497.70 and 148.95 is: 223.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    331.65 : 497.70 = 148.95 : x
  2. Step 2: Convert to fraction form
    331.65/497.70 = 148.95/x
  3. Step 3: Cross multiply
    331.65x = 497.70 × 148.95
  4. Step 4: Simplify right side
    331.65x = 74,132.42
  5. Step 5: Solve for x
    x = 74,132.42/331.65
  6. Step 6: Final answer
    x = 223.53

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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.