Home / 2,231.48-3,079.39-1,223.19

Finding the Fourth Proportional to 2,231.48, 3,079.39 and 1,223.19

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Solution

The fourth proportional to 2,231.48, 3,079.39 and 1,223.19 is: 1,687.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,231.48 : 3,079.39 = 1,223.19 : x
  2. Step 2: Convert to fraction form
    2,231.48/3,079.39 = 1,223.19/x
  3. Step 3: Cross multiply
    2,231.48x = 3,079.39 × 1,223.19
  4. Step 4: Simplify right side
    2,231.48x = 3,766,690.39
  5. Step 5: Solve for x
    x = 3,766,690.39/2,231.48
  6. Step 6: Final answer
    x = 1,687.98

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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.