Home / 2,221.40-3,065.68-1,277.49

Finding the Fourth Proportional to 2,221.40, 3,065.68 and 1,277.49

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Solution

The fourth proportional to 2,221.40, 3,065.68 and 1,277.49 is: 1,763.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,221.40 : 3,065.68 = 1,277.49 : x
  2. Step 2: Convert to fraction form
    2,221.40/3,065.68 = 1,277.49/x
  3. Step 3: Cross multiply
    2,221.40x = 3,065.68 × 1,277.49
  4. Step 4: Simplify right side
    2,221.40x = 3,916,375.54
  5. Step 5: Solve for x
    x = 3,916,375.54/2,221.40
  6. Step 6: Final answer
    x = 1,763.02

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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.