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Finding the Fourth Proportional to 3,988, 5,982.96 and 1,252

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Solution

The fourth proportional to 3,988, 5,982.96 and 1,252 is: 1,878.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,988 : 5,982.96 = 1,252 : x
  2. Step 2: Convert to fraction form
    3,988/5,982.96 = 1,252/x
  3. Step 3: Cross multiply
    3,988x = 5,982.96 × 1,252
  4. Step 4: Simplify right side
    3,988x = 7,490,665.92
  5. Step 5: Solve for x
    x = 7,490,665.92/3,988
  6. Step 6: Final answer
    x = 1,878.30

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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.