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Finding the Fourth Proportional to 1,422.68, 1,963.42 and 793.41

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Solution

The fourth proportional to 1,422.68, 1,963.42 and 793.41 is: 1,094.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,422.68 : 1,963.42 = 793.41 : x
  2. Step 2: Convert to fraction form
    1,422.68/1,963.42 = 793.41/x
  3. Step 3: Cross multiply
    1,422.68x = 1,963.42 × 793.41
  4. Step 4: Simplify right side
    1,422.68x = 1,557,793.10
  5. Step 5: Solve for x
    x = 1,557,793.10/1,422.68
  6. Step 6: Final answer
    x = 1,094.97

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.