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Finding the Fourth Proportional to 960.42, 1,439.01 and 635.61

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Solution

The fourth proportional to 960.42, 1,439.01 and 635.61 is: 952.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    960.42 : 1,439.01 = 635.61 : x
  2. Step 2: Convert to fraction form
    960.42/1,439.01 = 635.61/x
  3. Step 3: Cross multiply
    960.42x = 1,439.01 × 635.61
  4. Step 4: Simplify right side
    960.42x = 914,649.15
  5. Step 5: Solve for x
    x = 914,649.15/960.42
  6. Step 6: Final answer
    x = 952.34

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Double scale
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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.