Home / 2,378.24-3,280.80-1,445.12

Finding the Fourth Proportional to 2,378.24, 3,280.80 and 1,445.12

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Solution

The fourth proportional to 2,378.24, 3,280.80 and 1,445.12 is: 1,993.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,378.24 : 3,280.80 = 1,445.12 : x
  2. Step 2: Convert to fraction form
    2,378.24/3,280.80 = 1,445.12/x
  3. Step 3: Cross multiply
    2,378.24x = 3,280.80 × 1,445.12
  4. Step 4: Simplify right side
    2,378.24x = 4,741,149.70
  5. Step 5: Solve for x
    x = 4,741,149.70/2,378.24
  6. Step 6: Final answer
    x = 1,993.55

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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.