Home / 2,768.20-4,152.30-1,124.80

Finding the Fourth Proportional to 2,768.20, 4,152.30 and 1,124.80

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Solution

The fourth proportional to 2,768.20, 4,152.30 and 1,124.80 is: 1,687.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,768.20 : 4,152.30 = 1,124.80 : x
  2. Step 2: Convert to fraction form
    2,768.20/4,152.30 = 1,124.80/x
  3. Step 3: Cross multiply
    2,768.20x = 4,152.30 × 1,124.80
  4. Step 4: Simplify right side
    2,768.20x = 4,670,507.04
  5. Step 5: Solve for x
    x = 4,670,507.04/2,768.20
  6. Step 6: Final answer
    x = 1,687.20

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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.