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Finding the Fourth Proportional to 321,388.51, 443,469.57 and 178,148.53

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Solution

The fourth proportional to 321,388.51, 443,469.57 and 178,148.53 is: 245,819.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    321,388.51 : 443,469.57 = 178,148.53 : x
  2. Step 2: Convert to fraction form
    321,388.51/443,469.57 = 178,148.53/x
  3. Step 3: Cross multiply
    321,388.51x = 443,469.57 × 178,148.53
  4. Step 4: Simplify right side
    321,388.51x = 79,003,451,995.23
  5. Step 5: Solve for x
    x = 79,003,451,995.23/321,388.51
  6. Step 6: Final answer
    x = 245,819.16

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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.