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Finding the Fourth Proportional to 3,486.97, 5,229.88 and 1,147.00

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Solution

The fourth proportional to 3,486.97, 5,229.88 and 1,147.00 is: 1,720.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,486.97 : 5,229.88 = 1,147.00 : x
  2. Step 2: Convert to fraction form
    3,486.97/5,229.88 = 1,147.00/x
  3. Step 3: Cross multiply
    3,486.97x = 5,229.88 × 1,147.00
  4. Step 4: Simplify right side
    3,486.97x = 5,998,679.86
  5. Step 5: Solve for x
    x = 5,998,679.86/3,486.97
  6. Step 6: Final answer
    x = 1,720.31

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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.