Home / 2,781.50-4,172.20-932.74

Finding the Fourth Proportional to 2,781.50, 4,172.20 and 932.74

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Solution

The fourth proportional to 2,781.50, 4,172.20 and 932.74 is: 1,399.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,781.50 : 4,172.20 = 932.74 : x
  2. Step 2: Convert to fraction form
    2,781.50/4,172.20 = 932.74/x
  3. Step 3: Cross multiply
    2,781.50x = 4,172.20 × 932.74
  4. Step 4: Simplify right side
    2,781.50x = 3,891,577.83
  5. Step 5: Solve for x
    x = 3,891,577.83/2,781.50
  6. Step 6: Final answer
    x = 1,399.09

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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.