Home / 2,608.20-3,911.92-660.28

Finding the Fourth Proportional to 2,608.20, 3,911.92 and 660.28

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Solution

The fourth proportional to 2,608.20, 3,911.92 and 660.28 is: 990.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,608.20 : 3,911.92 = 660.28 : x
  2. Step 2: Convert to fraction form
    2,608.20/3,911.92 = 660.28/x
  3. Step 3: Cross multiply
    2,608.20x = 3,911.92 × 660.28
  4. Step 4: Simplify right side
    2,608.20x = 2,582,962.54
  5. Step 5: Solve for x
    x = 2,582,962.54/2,608.20
  6. Step 6: Final answer
    x = 990.32

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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.