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Finding the Fourth Proportional to 331.04, 496.60 and 87.57

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Solution

The fourth proportional to 331.04, 496.60 and 87.57 is: 131.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    331.04 : 496.60 = 87.57 : x
  2. Step 2: Convert to fraction form
    331.04/496.60 = 87.57/x
  3. Step 3: Cross multiply
    331.04x = 496.60 × 87.57
  4. Step 4: Simplify right side
    331.04x = 43,487.54
  5. Step 5: Solve for x
    x = 43,487.54/331.04
  6. Step 6: Final answer
    x = 131.37

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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.