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Finding the Fourth Proportional to 865.88, 1,195.12 and 516.76

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Solution

The fourth proportional to 865.88, 1,195.12 and 516.76 is: 713.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    865.88 : 1,195.12 = 516.76 : x
  2. Step 2: Convert to fraction form
    865.88/1,195.12 = 516.76/x
  3. Step 3: Cross multiply
    865.88x = 1,195.12 × 516.76
  4. Step 4: Simplify right side
    865.88x = 617,590.21
  5. Step 5: Solve for x
    x = 617,590.21/865.88
  6. Step 6: Final answer
    x = 713.25

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Double scale
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1.5x scale

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.