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Finding the Fourth Proportional to 271.28, 406.20 and 148.98

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Solution

The fourth proportional to 271.28, 406.20 and 148.98 is: 223.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    271.28 : 406.20 = 148.98 : x
  2. Step 2: Convert to fraction form
    271.28/406.20 = 148.98/x
  3. Step 3: Cross multiply
    271.28x = 406.20 × 148.98
  4. Step 4: Simplify right side
    271.28x = 60,515.68
  5. Step 5: Solve for x
    x = 60,515.68/271.28
  6. Step 6: Final answer
    x = 223.07

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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.