Home / 2,815.28-4,220.52-1,085.12

Finding the Fourth Proportional to 2,815.28, 4,220.52 and 1,085.12

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Solution

The fourth proportional to 2,815.28, 4,220.52 and 1,085.12 is: 1,626.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,815.28 : 4,220.52 = 1,085.12 : x
  2. Step 2: Convert to fraction form
    2,815.28/4,220.52 = 1,085.12/x
  3. Step 3: Cross multiply
    2,815.28x = 4,220.52 × 1,085.12
  4. Step 4: Simplify right side
    2,815.28x = 4,579,770.66
  5. Step 5: Solve for x
    x = 4,579,770.66/2,815.28
  6. Step 6: Final answer
    x = 1,626.75

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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.