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Finding the Fourth Proportional to 2,205.61, 3,305.74 and 818.48

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Solution

The fourth proportional to 2,205.61, 3,305.74 and 818.48 is: 1,226.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,205.61 : 3,305.74 = 818.48 : x
  2. Step 2: Convert to fraction form
    2,205.61/3,305.74 = 818.48/x
  3. Step 3: Cross multiply
    2,205.61x = 3,305.74 × 818.48
  4. Step 4: Simplify right side
    2,205.61x = 2,705,683.10
  5. Step 5: Solve for x
    x = 2,705,683.10/2,205.61
  6. Step 6: Final answer
    x = 1,226.73

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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.