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Finding the Fourth Proportional to 331.53, 497.31 and 100.43

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Solution

The fourth proportional to 331.53, 497.31 and 100.43 is: 150.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    331.53 : 497.31 = 100.43 : x
  2. Step 2: Convert to fraction form
    331.53/497.31 = 100.43/x
  3. Step 3: Cross multiply
    331.53x = 497.31 × 100.43
  4. Step 4: Simplify right side
    331.53x = 49,942.36
  5. Step 5: Solve for x
    x = 49,942.36/331.53
  6. Step 6: Final answer
    x = 150.64

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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.