Home / 3,188.28-4,781.28-1,107.90

Finding the Fourth Proportional to 3,188.28, 4,781.28 and 1,107.90

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Solution

The fourth proportional to 3,188.28, 4,781.28 and 1,107.90 is: 1,661.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,188.28 : 4,781.28 = 1,107.90 : x
  2. Step 2: Convert to fraction form
    3,188.28/4,781.28 = 1,107.90/x
  3. Step 3: Cross multiply
    3,188.28x = 4,781.28 × 1,107.90
  4. Step 4: Simplify right side
    3,188.28x = 5,297,180.11
  5. Step 5: Solve for x
    x = 5,297,180.11/3,188.28
  6. Step 6: Final answer
    x = 1,661.45

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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.