Home / 3,187.20-4,780.26-1,107.12

Finding the Fourth Proportional to 3,187.20, 4,780.26 and 1,107.12

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Solution

The fourth proportional to 3,187.20, 4,780.26 and 1,107.12 is: 1,660.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,187.20 : 4,780.26 = 1,107.12 : x
  2. Step 2: Convert to fraction form
    3,187.20/4,780.26 = 1,107.12/x
  3. Step 3: Cross multiply
    3,187.20x = 4,780.26 × 1,107.12
  4. Step 4: Simplify right side
    3,187.20x = 5,292,321.45
  5. Step 5: Solve for x
    x = 5,292,321.45/3,187.20
  6. Step 6: Final answer
    x = 1,660.49

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1.5x scale

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.