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Finding the Fourth Proportional to 881.00, 1,321.40 and 231.79

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Solution

The fourth proportional to 881.00, 1,321.40 and 231.79 is: 347.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    881.00 : 1,321.40 = 231.79 : x
  2. Step 2: Convert to fraction form
    881.00/1,321.40 = 231.79/x
  3. Step 3: Cross multiply
    881.00x = 1,321.40 × 231.79
  4. Step 4: Simplify right side
    881.00x = 306,285.65
  5. Step 5: Solve for x
    x = 306,285.65/881.00
  6. Step 6: Final answer
    x = 347.66

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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.