Home / 2,278.11-3,143.94-1,283.64

Finding the Fourth Proportional to 2,278.11, 3,143.94 and 1,283.64

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Solution

The fourth proportional to 2,278.11, 3,143.94 and 1,283.64 is: 1,771.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,278.11 : 3,143.94 = 1,283.64 : x
  2. Step 2: Convert to fraction form
    2,278.11/3,143.94 = 1,283.64/x
  3. Step 3: Cross multiply
    2,278.11x = 3,143.94 × 1,283.64
  4. Step 4: Simplify right side
    2,278.11x = 4,035,687.14
  5. Step 5: Solve for x
    x = 4,035,687.14/2,278.11
  6. Step 6: Final answer
    x = 1,771.51

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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.