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Finding the Fourth Proportional to 231.57, 347.35 and 220.03

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Solution

The fourth proportional to 231.57, 347.35 and 220.03 is: 330.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    231.57 : 347.35 = 220.03 : x
  2. Step 2: Convert to fraction form
    231.57/347.35 = 220.03/x
  3. Step 3: Cross multiply
    231.57x = 347.35 × 220.03
  4. Step 4: Simplify right side
    231.57x = 76,426.32
  5. Step 5: Solve for x
    x = 76,426.32/231.57
  6. Step 6: Final answer
    x = 330.04

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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.