Home / 2,520.54-3,781.19-1,287.28

Finding the Fourth Proportional to 2,520.54, 3,781.19 and 1,287.28

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Solution

The fourth proportional to 2,520.54, 3,781.19 and 1,287.28 is: 1,931.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,520.54 : 3,781.19 = 1,287.28 : x
  2. Step 2: Convert to fraction form
    2,520.54/3,781.19 = 1,287.28/x
  3. Step 3: Cross multiply
    2,520.54x = 3,781.19 × 1,287.28
  4. Step 4: Simplify right side
    2,520.54x = 4,867,431.36
  5. Step 5: Solve for x
    x = 4,867,431.36/2,520.54
  6. Step 6: Final answer
    x = 1,931.11

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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.