Home / 2,728.02-4,085.55-2,107.20

Finding the Fourth Proportional to 2,728.02, 4,085.55 and 2,107.20

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Solution

The fourth proportional to 2,728.02, 4,085.55 and 2,107.20 is: 3,155.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,728.02 : 4,085.55 = 2,107.20 : x
  2. Step 2: Convert to fraction form
    2,728.02/4,085.55 = 2,107.20/x
  3. Step 3: Cross multiply
    2,728.02x = 4,085.55 × 2,107.20
  4. Step 4: Simplify right side
    2,728.02x = 8,609,070.96
  5. Step 5: Solve for x
    x = 8,609,070.96/2,728.02
  6. Step 6: Final answer
    x = 3,155.79

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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.