Home / 3,988.36-5,982.86-1,215.28

Finding the Fourth Proportional to 3,988.36, 5,982.86 and 1,215.28

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Solution

The fourth proportional to 3,988.36, 5,982.86 and 1,215.28 is: 1,823.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,988.36 : 5,982.86 = 1,215.28 : x
  2. Step 2: Convert to fraction form
    3,988.36/5,982.86 = 1,215.28/x
  3. Step 3: Cross multiply
    3,988.36x = 5,982.86 × 1,215.28
  4. Step 4: Simplify right side
    3,988.36x = 7,270,850.10
  5. Step 5: Solve for x
    x = 7,270,850.10/3,988.36
  6. Step 6: Final answer
    x = 1,823.02

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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.