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Finding the Fourth Proportional to 547.27, 754.45 and 391.75

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Solution

The fourth proportional to 547.27, 754.45 and 391.75 is: 540.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    547.27 : 754.45 = 391.75 : x
  2. Step 2: Convert to fraction form
    547.27/754.45 = 391.75/x
  3. Step 3: Cross multiply
    547.27x = 754.45 × 391.75
  4. Step 4: Simplify right side
    547.27x = 295,555.79
  5. Step 5: Solve for x
    x = 295,555.79/547.27
  6. Step 6: Final answer
    x = 540.05

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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.