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Finding the Fourth Proportional to 321,580.05, 443,751.39 and 178,339.65

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Solution

The fourth proportional to 321,580.05, 443,751.39 and 178,339.65 is: 246,092.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    321,580.05 : 443,751.39 = 178,339.65 : x
  2. Step 2: Convert to fraction form
    321,580.05/443,751.39 = 178,339.65/x
  3. Step 3: Cross multiply
    321,580.05x = 443,751.39 × 178,339.65
  4. Step 4: Simplify right side
    321,580.05x = 79,138,467,579.61
  5. Step 5: Solve for x
    x = 79,138,467,579.61/321,580.05
  6. Step 6: Final answer
    x = 246,092.59

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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.