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Finding the Fourth Proportional to 631.44, 871.20 and 610.56

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Solution

The fourth proportional to 631.44, 871.20 and 610.56 is: 842.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    631.44 : 871.20 = 610.56 : x
  2. Step 2: Convert to fraction form
    631.44/871.20 = 610.56/x
  3. Step 3: Cross multiply
    631.44x = 871.20 × 610.56
  4. Step 4: Simplify right side
    631.44x = 531,919.87
  5. Step 5: Solve for x
    x = 531,919.87/631.44
  6. Step 6: Final answer
    x = 842.39

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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.