Home / 3,680.86-5,079.55-2,188.75

Finding the Fourth Proportional to 3,680.86, 5,079.55 and 2,188.75

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Solution

The fourth proportional to 3,680.86, 5,079.55 and 2,188.75 is: 3,020.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,680.86 : 5,079.55 = 2,188.75 : x
  2. Step 2: Convert to fraction form
    3,680.86/5,079.55 = 2,188.75/x
  3. Step 3: Cross multiply
    3,680.86x = 5,079.55 × 2,188.75
  4. Step 4: Simplify right side
    3,680.86x = 11,117,843.16
  5. Step 5: Solve for x
    x = 11,117,843.16/3,680.86
  6. Step 6: Final answer
    x = 3,020.45

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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.