Home / 2,728.50-3,765.69-1,680.18

Finding the Fourth Proportional to 2,728.50, 3,765.69 and 1,680.18

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Solution

The fourth proportional to 2,728.50, 3,765.69 and 1,680.18 is: 2,318.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,728.50 : 3,765.69 = 1,680.18 : x
  2. Step 2: Convert to fraction form
    2,728.50/3,765.69 = 1,680.18/x
  3. Step 3: Cross multiply
    2,728.50x = 3,765.69 × 1,680.18
  4. Step 4: Simplify right side
    2,728.50x = 6,327,037.02
  5. Step 5: Solve for x
    x = 6,327,037.02/2,728.50
  6. Step 6: Final answer
    x = 2,318.87

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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.