Home / 2,842.20-4,259.70-1,378.20

Finding the Fourth Proportional to 2,842.20, 4,259.70 and 1,378.20

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Solution

The fourth proportional to 2,842.20, 4,259.70 and 1,378.20 is: 2,065.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,842.20 : 4,259.70 = 1,378.20 : x
  2. Step 2: Convert to fraction form
    2,842.20/4,259.70 = 1,378.20/x
  3. Step 3: Cross multiply
    2,842.20x = 4,259.70 × 1,378.20
  4. Step 4: Simplify right side
    2,842.20x = 5,870,718.54
  5. Step 5: Solve for x
    x = 5,870,718.54/2,842.20
  6. Step 6: Final answer
    x = 2,065.55

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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.