Home / 2,722.45-4,083.58-721.15

Finding the Fourth Proportional to 2,722.45, 4,083.58 and 721.15

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Solution

The fourth proportional to 2,722.45, 4,083.58 and 721.15 is: 1,081.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,722.45 : 4,083.58 = 721.15 : x
  2. Step 2: Convert to fraction form
    2,722.45/4,083.58 = 721.15/x
  3. Step 3: Cross multiply
    2,722.45x = 4,083.58 × 721.15
  4. Step 4: Simplify right side
    2,722.45x = 2,944,873.72
  5. Step 5: Solve for x
    x = 2,944,873.72/2,722.45
  6. Step 6: Final answer
    x = 1,081.70

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.