Home / 2,278.94-3,144.92-1,284.21

Finding the Fourth Proportional to 2,278.94, 3,144.92 and 1,284.21

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Solution

The fourth proportional to 2,278.94, 3,144.92 and 1,284.21 is: 1,772.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,278.94 : 3,144.92 = 1,284.21 : x
  2. Step 2: Convert to fraction form
    2,278.94/3,144.92 = 1,284.21/x
  3. Step 3: Cross multiply
    2,278.94x = 3,144.92 × 1,284.21
  4. Step 4: Simplify right side
    2,278.94x = 4,038,731.29
  5. Step 5: Solve for x
    x = 4,038,731.29/2,278.94
  6. Step 6: Final answer
    x = 1,772.20

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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.