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Finding the Fourth Proportional to 331.18, 496.85 and 100.07

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Solution

The fourth proportional to 331.18, 496.85 and 100.07 is: 150.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    331.18 : 496.85 = 100.07 : x
  2. Step 2: Convert to fraction form
    331.18/496.85 = 100.07/x
  3. Step 3: Cross multiply
    331.18x = 496.85 × 100.07
  4. Step 4: Simplify right side
    331.18x = 49,718.66
  5. Step 5: Solve for x
    x = 49,718.66/331.18
  6. Step 6: Final answer
    x = 150.13

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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.