Home / 2,217.45-3,059.40-1,320.78

Finding the Fourth Proportional to 2,217.45, 3,059.40 and 1,320.78

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Solution

The fourth proportional to 2,217.45, 3,059.40 and 1,320.78 is: 1,822.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,217.45 : 3,059.40 = 1,320.78 : x
  2. Step 2: Convert to fraction form
    2,217.45/3,059.40 = 1,320.78/x
  3. Step 3: Cross multiply
    2,217.45x = 3,059.40 × 1,320.78
  4. Step 4: Simplify right side
    2,217.45x = 4,040,794.33
  5. Step 5: Solve for x
    x = 4,040,794.33/2,217.45
  6. Step 6: Final answer
    x = 1,822.27

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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.