Home / 2,205.16-3,309.08-818.28

Finding the Fourth Proportional to 2,205.16, 3,309.08 and 818.28

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Solution

The fourth proportional to 2,205.16, 3,309.08 and 818.28 is: 1,227.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,205.16 : 3,309.08 = 818.28 : x
  2. Step 2: Convert to fraction form
    2,205.16/3,309.08 = 818.28/x
  3. Step 3: Cross multiply
    2,205.16x = 3,309.08 × 818.28
  4. Step 4: Simplify right side
    2,205.16x = 2,707,753.98
  5. Step 5: Solve for x
    x = 2,707,753.98/2,205.16
  6. Step 6: Final answer
    x = 1,227.92

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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.