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Finding the Fourth Proportional to 331.70, 497.66 and 126.30

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Solution

The fourth proportional to 331.70, 497.66 and 126.30 is: 189.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    331.70 : 497.66 = 126.30 : x
  2. Step 2: Convert to fraction form
    331.70/497.66 = 126.30/x
  3. Step 3: Cross multiply
    331.70x = 497.66 × 126.30
  4. Step 4: Simplify right side
    331.70x = 62,853.83
  5. Step 5: Solve for x
    x = 62,853.83/331.70
  6. Step 6: Final answer
    x = 189.49

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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.