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Finding the Fourth Proportional to 2,331.92, 3,218.11 and 1,387.82

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Solution

The fourth proportional to 2,331.92, 3,218.11 and 1,387.82 is: 1,915.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,331.92 : 3,218.11 = 1,387.82 : x
  2. Step 2: Convert to fraction form
    2,331.92/3,218.11 = 1,387.82/x
  3. Step 3: Cross multiply
    2,331.92x = 3,218.11 × 1,387.82
  4. Step 4: Simplify right side
    2,331.92x = 4,466,157.42
  5. Step 5: Solve for x
    x = 4,466,157.42/2,331.92
  6. Step 6: Final answer
    x = 1,915.23

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