Home / 2,278.19-3,143.79-1,394.07

Finding the Fourth Proportional to 2,278.19, 3,143.79 and 1,394.07

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Solution

The fourth proportional to 2,278.19, 3,143.79 and 1,394.07 is: 1,923.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,278.19 : 3,143.79 = 1,394.07 : x
  2. Step 2: Convert to fraction form
    2,278.19/3,143.79 = 1,394.07/x
  3. Step 3: Cross multiply
    2,278.19x = 3,143.79 × 1,394.07
  4. Step 4: Simplify right side
    2,278.19x = 4,382,663.33
  5. Step 5: Solve for x
    x = 4,382,663.33/2,278.19
  6. Step 6: Final answer
    x = 1,923.75

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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.