Home / 2,859.20-3,945.68-1,617.20

Finding the Fourth Proportional to 2,859.20, 3,945.68 and 1,617.20

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Solution

The fourth proportional to 2,859.20, 3,945.68 and 1,617.20 is: 2,231.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,859.20 : 3,945.68 = 1,617.20 : x
  2. Step 2: Convert to fraction form
    2,859.20/3,945.68 = 1,617.20/x
  3. Step 3: Cross multiply
    2,859.20x = 3,945.68 × 1,617.20
  4. Step 4: Simplify right side
    2,859.20x = 6,380,953.70
  5. Step 5: Solve for x
    x = 6,380,953.70/2,859.20
  6. Step 6: Final answer
    x = 2,231.73

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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.