Home / 2,119.75-2,924.57-1,280.70

Finding the Fourth Proportional to 2,119.75, 2,924.57 and 1,280.70

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Solution

The fourth proportional to 2,119.75, 2,924.57 and 1,280.70 is: 1,766.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,119.75 : 2,924.57 = 1,280.70 : x
  2. Step 2: Convert to fraction form
    2,119.75/2,924.57 = 1,280.70/x
  3. Step 3: Cross multiply
    2,119.75x = 2,924.57 × 1,280.70
  4. Step 4: Simplify right side
    2,119.75x = 3,745,500.00
  5. Step 5: Solve for x
    x = 3,745,500.00/2,119.75
  6. Step 6: Final answer
    x = 1,766.96

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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.