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Finding the Fourth Proportional to 3,990.44, 5,506.80 and 2,222.22

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Solution

The fourth proportional to 3,990.44, 5,506.80 and 2,222.22 is: 3,066.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,990.44 : 5,506.80 = 2,222.22 : x
  2. Step 2: Convert to fraction form
    3,990.44/5,506.80 = 2,222.22/x
  3. Step 3: Cross multiply
    3,990.44x = 5,506.80 × 2,222.22
  4. Step 4: Simplify right side
    3,990.44x = 12,237,321.10
  5. Step 5: Solve for x
    x = 12,237,321.10/3,990.44
  6. Step 6: Final answer
    x = 3,066.66

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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.