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Finding the Fourth Proportional to 880.67, 1,321.79 and 787.97

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Solution

The fourth proportional to 880.67, 1,321.79 and 787.97 is: 1,182.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    880.67 : 1,321.79 = 787.97 : x
  2. Step 2: Convert to fraction form
    880.67/1,321.79 = 787.97/x
  3. Step 3: Cross multiply
    880.67x = 1,321.79 × 787.97
  4. Step 4: Simplify right side
    880.67x = 1,041,530.23
  5. Step 5: Solve for x
    x = 1,041,530.23/880.67
  6. Step 6: Final answer
    x = 1,182.65

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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.