Home / 2,639.55-3,642.75-1,520.85

Finding the Fourth Proportional to 2,639.55, 3,642.75 and 1,520.85

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Solution

The fourth proportional to 2,639.55, 3,642.75 and 1,520.85 is: 2,098.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,639.55 : 3,642.75 = 1,520.85 : x
  2. Step 2: Convert to fraction form
    2,639.55/3,642.75 = 1,520.85/x
  3. Step 3: Cross multiply
    2,639.55x = 3,642.75 × 1,520.85
  4. Step 4: Simplify right side
    2,639.55x = 5,540,076.34
  5. Step 5: Solve for x
    x = 5,540,076.34/2,639.55
  6. Step 6: Final answer
    x = 2,098.87

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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.