Home / 2,231.32-3,079.38-1,287.04

Finding the Fourth Proportional to 2,231.32, 3,079.38 and 1,287.04

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Solution

The fourth proportional to 2,231.32, 3,079.38 and 1,287.04 is: 1,776.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,231.32 : 3,079.38 = 1,287.04 : x
  2. Step 2: Convert to fraction form
    2,231.32/3,079.38 = 1,287.04/x
  3. Step 3: Cross multiply
    2,231.32x = 3,079.38 × 1,287.04
  4. Step 4: Simplify right side
    2,231.32x = 3,963,285.24
  5. Step 5: Solve for x
    x = 3,963,285.24/2,231.32
  6. Step 6: Final answer
    x = 1,776.21

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.