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Finding the Fourth Proportional to 321,578.93, 443,749.84 and 178,338.53

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Solution

The fourth proportional to 321,578.93, 443,749.84 and 178,338.53 is: 246,091.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    321,578.93 : 443,749.84 = 178,338.53 : x
  2. Step 2: Convert to fraction form
    321,578.93/443,749.84 = 178,338.53/x
  3. Step 3: Cross multiply
    321,578.93x = 443,749.84 × 178,338.53
  4. Step 4: Simplify right side
    321,578.93x = 79,137,691,488.74
  5. Step 5: Solve for x
    x = 79,137,691,488.74/321,578.93
  6. Step 6: Final answer
    x = 246,091.04

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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.