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Finding the Fourth Proportional to 880.67, 1,321.01 and 231.39

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Solution

The fourth proportional to 880.67, 1,321.01 and 231.39 is: 347.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    880.67 : 1,321.01 = 231.39 : x
  2. Step 2: Convert to fraction form
    880.67/1,321.01 = 231.39/x
  3. Step 3: Cross multiply
    880.67x = 1,321.01 × 231.39
  4. Step 4: Simplify right side
    880.67x = 305,668.21
  5. Step 5: Solve for x
    x = 305,668.21/880.67
  6. Step 6: Final answer
    x = 347.09

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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.