Home / 3,988.28-5,982.64-1,215.04

Finding the Fourth Proportional to 3,988.28, 5,982.64 and 1,215.04

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Solution

The fourth proportional to 3,988.28, 5,982.64 and 1,215.04 is: 1,822.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,988.28 : 5,982.64 = 1,215.04 : x
  2. Step 2: Convert to fraction form
    3,988.28/5,982.64 = 1,215.04/x
  3. Step 3: Cross multiply
    3,988.28x = 5,982.64 × 1,215.04
  4. Step 4: Simplify right side
    3,988.28x = 7,269,146.91
  5. Step 5: Solve for x
    x = 7,269,146.91/3,988.28
  6. Step 6: Final answer
    x = 1,822.63

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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.