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Finding the Fourth Proportional to 311.13, 468.54 and 271.03

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Solution

The fourth proportional to 311.13, 468.54 and 271.03 is: 408.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    311.13 : 468.54 = 271.03 : x
  2. Step 2: Convert to fraction form
    311.13/468.54 = 271.03/x
  3. Step 3: Cross multiply
    311.13x = 468.54 × 271.03
  4. Step 4: Simplify right side
    311.13x = 126,988.40
  5. Step 5: Solve for x
    x = 126,988.40/311.13
  6. Step 6: Final answer
    x = 408.15

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.