Home / 3,187.03-4,398.12-1,789.78

Finding the Fourth Proportional to 3,187.03, 4,398.12 and 1,789.78

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Solution

The fourth proportional to 3,187.03, 4,398.12 and 1,789.78 is: 2,469.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,187.03 : 4,398.12 = 1,789.78 : x
  2. Step 2: Convert to fraction form
    3,187.03/4,398.12 = 1,789.78/x
  3. Step 3: Cross multiply
    3,187.03x = 4,398.12 × 1,789.78
  4. Step 4: Simplify right side
    3,187.03x = 7,871,636.27
  5. Step 5: Solve for x
    x = 7,871,636.27/3,187.03
  6. Step 6: Final answer
    x = 2,469.90

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.