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Finding the Fourth Proportional to 547.96, 756.17 and 311.88

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Solution

The fourth proportional to 547.96, 756.17 and 311.88 is: 430.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    547.96 : 756.17 = 311.88 : x
  2. Step 2: Convert to fraction form
    547.96/756.17 = 311.88/x
  3. Step 3: Cross multiply
    547.96x = 756.17 × 311.88
  4. Step 4: Simplify right side
    547.96x = 235,833.91
  5. Step 5: Solve for x
    x = 235,833.91/547.96
  6. Step 6: Final answer
    x = 430.38

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.