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Finding the Fourth Proportional to 778.82, 1,079.88 and 752.79

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Solution

The fourth proportional to 778.82, 1,079.88 and 752.79 is: 1,043.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    778.82 : 1,079.88 = 752.79 : x
  2. Step 2: Convert to fraction form
    778.82/1,079.88 = 752.79/x
  3. Step 3: Cross multiply
    778.82x = 1,079.88 × 752.79
  4. Step 4: Simplify right side
    778.82x = 812,928.33
  5. Step 5: Solve for x
    x = 812,928.33/778.82
  6. Step 6: Final answer
    x = 1,043.80

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Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.