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Finding the Fourth Proportional to 794.10, 1,191.15 and 659.70

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Solution

The fourth proportional to 794.10, 1,191.15 and 659.70 is: 989.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    794.10 : 1,191.15 = 659.70 : x
  2. Step 2: Convert to fraction form
    794.10/1,191.15 = 659.70/x
  3. Step 3: Cross multiply
    794.10x = 1,191.15 × 659.70
  4. Step 4: Simplify right side
    794.10x = 785,801.66
  5. Step 5: Solve for x
    x = 785,801.66/794.10
  6. Step 6: Final answer
    x = 989.55

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Similar ratio
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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.