Home / 4,188.72-6,273.96-1,990.78

Finding the Fourth Proportional to 4,188.72, 6,273.96 and 1,990.78

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Solution

The fourth proportional to 4,188.72, 6,273.96 and 1,990.78 is: 2,981.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,188.72 : 6,273.96 = 1,990.78 : x
  2. Step 2: Convert to fraction form
    4,188.72/6,273.96 = 1,990.78/x
  3. Step 3: Cross multiply
    4,188.72x = 6,273.96 × 1,990.78
  4. Step 4: Simplify right side
    4,188.72x = 12,490,074.09
  5. Step 5: Solve for x
    x = 12,490,074.09/4,188.72
  6. Step 6: Final answer
    x = 2,981.84

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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.