Home / 2,319.79-3,480.80-1,149.90

Finding the Fourth Proportional to 2,319.79, 3,480.80 and 1,149.90

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Solution

The fourth proportional to 2,319.79, 3,480.80 and 1,149.90 is: 1,725.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,319.79 : 3,480.80 = 1,149.90 : x
  2. Step 2: Convert to fraction form
    2,319.79/3,480.80 = 1,149.90/x
  3. Step 3: Cross multiply
    2,319.79x = 3,480.80 × 1,149.90
  4. Step 4: Simplify right side
    2,319.79x = 4,002,571.92
  5. Step 5: Solve for x
    x = 4,002,571.92/2,319.79
  6. Step 6: Final answer
    x = 1,725.40

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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.