Home / 2,781.08-4,172.92-1,220.88

Finding the Fourth Proportional to 2,781.08, 4,172.92 and 1,220.88

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Solution

The fourth proportional to 2,781.08, 4,172.92 and 1,220.88 is: 1,831.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,781.08 : 4,172.92 = 1,220.88 : x
  2. Step 2: Convert to fraction form
    2,781.08/4,172.92 = 1,220.88/x
  3. Step 3: Cross multiply
    2,781.08x = 4,172.92 × 1,220.88
  4. Step 4: Simplify right side
    2,781.08x = 5,094,634.57
  5. Step 5: Solve for x
    x = 5,094,634.57/2,781.08
  6. Step 6: Final answer
    x = 1,831.89

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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.