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Finding the Fourth Proportional to 331.05, 496.58 and 87.59

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Solution

The fourth proportional to 331.05, 496.58 and 87.59 is: 131.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    331.05 : 496.58 = 87.59 : x
  2. Step 2: Convert to fraction form
    331.05/496.58 = 87.59/x
  3. Step 3: Cross multiply
    331.05x = 496.58 × 87.59
  4. Step 4: Simplify right side
    331.05x = 43,492.52
  5. Step 5: Solve for x
    x = 43,492.52/331.05
  6. Step 6: Final answer
    x = 131.38

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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.