Home / 3,988.22-5,985.07-1,391.16

Finding the Fourth Proportional to 3,988.22, 5,985.07 and 1,391.16

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Solution

The fourth proportional to 3,988.22, 5,985.07 and 1,391.16 is: 2,087.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,988.22 : 5,985.07 = 1,391.16 : x
  2. Step 2: Convert to fraction form
    3,988.22/5,985.07 = 1,391.16/x
  3. Step 3: Cross multiply
    3,988.22x = 5,985.07 × 1,391.16
  4. Step 4: Simplify right side
    3,988.22x = 8,326,171.54
  5. Step 5: Solve for x
    x = 8,326,171.54/3,988.22
  6. Step 6: Final answer
    x = 2,087.69

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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.