Home / 2,278.18-3,143.26-1,283.40

Finding the Fourth Proportional to 2,278.18, 3,143.26 and 1,283.40

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Solution

The fourth proportional to 2,278.18, 3,143.26 and 1,283.40 is: 1,770.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,278.18 : 3,143.26 = 1,283.40 : x
  2. Step 2: Convert to fraction form
    2,278.18/3,143.26 = 1,283.40/x
  3. Step 3: Cross multiply
    2,278.18x = 3,143.26 × 1,283.40
  4. Step 4: Simplify right side
    2,278.18x = 4,034,059.88
  5. Step 5: Solve for x
    x = 4,034,059.88/2,278.18
  6. Step 6: Final answer
    x = 1,770.74

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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.