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Finding the Fourth Proportional to 331.85, 498.12 and 158.66

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Solution

The fourth proportional to 331.85, 498.12 and 158.66 is: 238.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    331.85 : 498.12 = 158.66 : x
  2. Step 2: Convert to fraction form
    331.85/498.12 = 158.66/x
  3. Step 3: Cross multiply
    331.85x = 498.12 × 158.66
  4. Step 4: Simplify right side
    331.85x = 79,030.50
  5. Step 5: Solve for x
    x = 79,030.50/331.85
  6. Step 6: Final answer
    x = 238.15

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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.