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Finding the Fourth Proportional to 266.56, 398.88 and 231.88

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Solution

The fourth proportional to 266.56, 398.88 and 231.88 is: 346.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    266.56 : 398.88 = 231.88 : x
  2. Step 2: Convert to fraction form
    266.56/398.88 = 231.88/x
  3. Step 3: Cross multiply
    266.56x = 398.88 × 231.88
  4. Step 4: Simplify right side
    266.56x = 92,492.29
  5. Step 5: Solve for x
    x = 92,492.29/266.56
  6. Step 6: Final answer
    x = 346.98

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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.