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Finding the Fourth Proportional to 4,451.60, 6,664.60 and 3,990.80

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Solution

The fourth proportional to 4,451.60, 6,664.60 and 3,990.80 is: 5,974.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,451.60 : 6,664.60 = 3,990.80 : x
  2. Step 2: Convert to fraction form
    4,451.60/6,664.60 = 3,990.80/x
  3. Step 3: Cross multiply
    4,451.60x = 6,664.60 × 3,990.80
  4. Step 4: Simplify right side
    4,451.60x = 26,597,085.68
  5. Step 5: Solve for x
    x = 26,597,085.68/4,451.60
  6. Step 6: Final answer
    x = 5,974.72

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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.