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Finding the Fourth Proportional to 321,638.87, 443,914.79 and 178,445.04

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Solution

The fourth proportional to 321,638.87, 443,914.79 and 178,445.04 is: 246,283.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    321,638.87 : 443,914.79 = 178,445.04 : x
  2. Step 2: Convert to fraction form
    321,638.87/443,914.79 = 178,445.04/x
  3. Step 3: Cross multiply
    321,638.87x = 443,914.79 × 178,445.04
  4. Step 4: Simplify right side
    321,638.87x = 79,214,392,458.14
  5. Step 5: Solve for x
    x = 79,214,392,458.14/321,638.87
  6. Step 6: Final answer
    x = 246,283.64

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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.