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Finding the Fourth Proportional to 331.70, 439.87 and 331.70

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Solution

The fourth proportional to 331.70, 439.87 and 331.70 is: 439.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    331.70 : 439.87 = 331.70 : x
  2. Step 2: Convert to fraction form
    331.70/439.87 = 331.70/x
  3. Step 3: Cross multiply
    331.70x = 439.87 × 331.70
  4. Step 4: Simplify right side
    331.70x = 145,903.22
  5. Step 5: Solve for x
    x = 145,903.22/331.70
  6. Step 6: Final answer
    x = 439.87

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Why These Related Problems?

These problems maintain the same ratio (1.33) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.