Home / 2,162.76-2,984.19-1,278.72

Finding the Fourth Proportional to 2,162.76, 2,984.19 and 1,278.72

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Solution

The fourth proportional to 2,162.76, 2,984.19 and 1,278.72 is: 1,764.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,162.76 : 2,984.19 = 1,278.72 : x
  2. Step 2: Convert to fraction form
    2,162.76/2,984.19 = 1,278.72/x
  3. Step 3: Cross multiply
    2,162.76x = 2,984.19 × 1,278.72
  4. Step 4: Simplify right side
    2,162.76x = 3,815,943.44
  5. Step 5: Solve for x
    x = 3,815,943.44/2,162.76
  6. Step 6: Final answer
    x = 1,764.39

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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.