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Finding the Fourth Proportional to 266.72, 399.84 and 170.24

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Solution

The fourth proportional to 266.72, 399.84 and 170.24 is: 255.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    266.72 : 399.84 = 170.24 : x
  2. Step 2: Convert to fraction form
    266.72/399.84 = 170.24/x
  3. Step 3: Cross multiply
    266.72x = 399.84 × 170.24
  4. Step 4: Simplify right side
    266.72x = 68,068.76
  5. Step 5: Solve for x
    x = 68,068.76/266.72
  6. Step 6: Final answer
    x = 255.21

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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.