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Finding the Fourth Proportional to 3,191.78, 4,787.75 and 883.30

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Solution

The fourth proportional to 3,191.78, 4,787.75 and 883.30 is: 1,324.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,191.78 : 4,787.75 = 883.30 : x
  2. Step 2: Convert to fraction form
    3,191.78/4,787.75 = 883.30/x
  3. Step 3: Cross multiply
    3,191.78x = 4,787.75 × 883.30
  4. Step 4: Simplify right side
    3,191.78x = 4,229,019.58
  5. Step 5: Solve for x
    x = 4,229,019.58/3,191.78
  6. Step 6: Final answer
    x = 1,324.97

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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.