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Finding the Fourth Proportional to 880.92, 1,321.38 and 231.66

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Solution

The fourth proportional to 880.92, 1,321.38 and 231.66 is: 347.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    880.92 : 1,321.38 = 231.66 : x
  2. Step 2: Convert to fraction form
    880.92/1,321.38 = 231.66/x
  3. Step 3: Cross multiply
    880.92x = 1,321.38 × 231.66
  4. Step 4: Simplify right side
    880.92x = 306,110.89
  5. Step 5: Solve for x
    x = 306,110.89/880.92
  6. Step 6: Final answer
    x = 347.49

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Double scale
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Similar ratio
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1.5x scale

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.