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Finding the Fourth Proportional to 769.35, 1,063.09 and 547.91

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Solution

The fourth proportional to 769.35, 1,063.09 and 547.91 is: 757.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    769.35 : 1,063.09 = 547.91 : x
  2. Step 2: Convert to fraction form
    769.35/1,063.09 = 547.91/x
  3. Step 3: Cross multiply
    769.35x = 1,063.09 × 547.91
  4. Step 4: Simplify right side
    769.35x = 582,478.75
  5. Step 5: Solve for x
    x = 582,478.75/769.35
  6. Step 6: Final answer
    x = 757.11

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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.