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Finding the Fourth Proportional to 2,205.45, 3,307.99 and 818.13

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Solution

The fourth proportional to 2,205.45, 3,307.99 and 818.13 is: 1,227.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,205.45 : 3,307.99 = 818.13 : x
  2. Step 2: Convert to fraction form
    2,205.45/3,307.99 = 818.13/x
  3. Step 3: Cross multiply
    2,205.45x = 3,307.99 × 818.13
  4. Step 4: Simplify right side
    2,205.45x = 2,706,365.86
  5. Step 5: Solve for x
    x = 2,706,365.86/2,205.45
  6. Step 6: Final answer
    x = 1,227.13

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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.