Home / 2,112.08-3,165.76-724.12

Finding the Fourth Proportional to 2,112.08, 3,165.76 and 724.12

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Solution

The fourth proportional to 2,112.08, 3,165.76 and 724.12 is: 1,085.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,112.08 : 3,165.76 = 724.12 : x
  2. Step 2: Convert to fraction form
    2,112.08/3,165.76 = 724.12/x
  3. Step 3: Cross multiply
    2,112.08x = 3,165.76 × 724.12
  4. Step 4: Simplify right side
    2,112.08x = 2,292,390.13
  5. Step 5: Solve for x
    x = 2,292,390.13/2,112.08
  6. Step 6: Final answer
    x = 1,085.37

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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.