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Finding the Fourth Proportional to 2,205.58, 3,307.99 and 818.59

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Solution

The fourth proportional to 2,205.58, 3,307.99 and 818.59 is: 1,227.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,205.58 : 3,307.99 = 818.59 : x
  2. Step 2: Convert to fraction form
    2,205.58/3,307.99 = 818.59/x
  3. Step 3: Cross multiply
    2,205.58x = 3,307.99 × 818.59
  4. Step 4: Simplify right side
    2,205.58x = 2,707,887.53
  5. Step 5: Solve for x
    x = 2,707,887.53/2,205.58
  6. Step 6: Final answer
    x = 1,227.74

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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.