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Finding the Fourth Proportional to 865.62, 1,191.24 and 696.24

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Solution

The fourth proportional to 865.62, 1,191.24 and 696.24 is: 958.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    865.62 : 1,191.24 = 696.24 : x
  2. Step 2: Convert to fraction form
    865.62/1,191.24 = 696.24/x
  3. Step 3: Cross multiply
    865.62x = 1,191.24 × 696.24
  4. Step 4: Simplify right side
    865.62x = 829,388.94
  5. Step 5: Solve for x
    x = 829,388.94/865.62
  6. Step 6: Final answer
    x = 958.14

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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.