Home / 1,680.57-2,517.76-1,217.20

Finding the Fourth Proportional to 1,680.57, 2,517.76 and 1,217.20

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Solution

The fourth proportional to 1,680.57, 2,517.76 and 1,217.20 is: 1,823.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,680.57 : 2,517.76 = 1,217.20 : x
  2. Step 2: Convert to fraction form
    1,680.57/2,517.76 = 1,217.20/x
  3. Step 3: Cross multiply
    1,680.57x = 2,517.76 × 1,217.20
  4. Step 4: Simplify right side
    1,680.57x = 3,064,621.08
  5. Step 5: Solve for x
    x = 3,064,621.08/1,680.57
  6. Step 6: Final answer
    x = 1,823.56

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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.