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Finding the Fourth Proportional to 3,899.40, 5,377.03 and 3,185.92

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Solution

The fourth proportional to 3,899.40, 5,377.03 and 3,185.92 is: 4,393.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,899.40 : 5,377.03 = 3,185.92 : x
  2. Step 2: Convert to fraction form
    3,899.40/5,377.03 = 3,185.92/x
  3. Step 3: Cross multiply
    3,899.40x = 5,377.03 × 3,185.92
  4. Step 4: Simplify right side
    3,899.40x = 17,130,787.42
  5. Step 5: Solve for x
    x = 17,130,787.42/3,899.40
  6. Step 6: Final answer
    x = 4,393.19

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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.