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Finding the Fourth Proportional to 266.78, 399.88 and 175.54

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Solution

The fourth proportional to 266.78, 399.88 and 175.54 is: 263.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    266.78 : 399.88 = 175.54 : x
  2. Step 2: Convert to fraction form
    266.78/399.88 = 175.54/x
  3. Step 3: Cross multiply
    266.78x = 399.88 × 175.54
  4. Step 4: Simplify right side
    266.78x = 70,194.94
  5. Step 5: Solve for x
    x = 70,194.94/266.78
  6. Step 6: Final answer
    x = 263.12

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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.