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Finding the Fourth Proportional to 266.55, 399.43 and 175.42

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Solution

The fourth proportional to 266.55, 399.43 and 175.42 is: 262.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    266.55 : 399.43 = 175.42 : x
  2. Step 2: Convert to fraction form
    266.55/399.43 = 175.42/x
  3. Step 3: Cross multiply
    266.55x = 399.43 × 175.42
  4. Step 4: Simplify right side
    266.55x = 70,068.01
  5. Step 5: Solve for x
    x = 70,068.01/266.55
  6. Step 6: Final answer
    x = 262.87

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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.