Home / 1,942.67-2,680.20-1,280.19

Finding the Fourth Proportional to 1,942.67, 2,680.20 and 1,280.19

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Solution

The fourth proportional to 1,942.67, 2,680.20 and 1,280.19 is: 1,766.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,942.67 : 2,680.20 = 1,280.19 : x
  2. Step 2: Convert to fraction form
    1,942.67/2,680.20 = 1,280.19/x
  3. Step 3: Cross multiply
    1,942.67x = 2,680.20 × 1,280.19
  4. Step 4: Simplify right side
    1,942.67x = 3,431,165.24
  5. Step 5: Solve for x
    x = 3,431,165.24/1,942.67
  6. Step 6: Final answer
    x = 1,766.22

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Double scale
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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.