Home / 2,221.92-3,065.28-1,290.24

Finding the Fourth Proportional to 2,221.92, 3,065.28 and 1,290.24

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Solution

The fourth proportional to 2,221.92, 3,065.28 and 1,290.24 is: 1,779.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,221.92 : 3,065.28 = 1,290.24 : x
  2. Step 2: Convert to fraction form
    2,221.92/3,065.28 = 1,290.24/x
  3. Step 3: Cross multiply
    2,221.92x = 3,065.28 × 1,290.24
  4. Step 4: Simplify right side
    2,221.92x = 3,954,946.87
  5. Step 5: Solve for x
    x = 3,954,946.87/2,221.92
  6. Step 6: Final answer
    x = 1,779.97

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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.