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Finding the Fourth Proportional to 321,487.48, 443,650.56 and 178,247.56

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Solution

The fourth proportional to 321,487.48, 443,650.56 and 178,247.56 is: 245,980.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    321,487.48 : 443,650.56 = 178,247.56 : x
  2. Step 2: Convert to fraction form
    321,487.48/443,650.56 = 178,247.56/x
  3. Step 3: Cross multiply
    321,487.48x = 443,650.56 × 178,247.56
  4. Step 4: Simplify right side
    321,487.48x = 79,079,629,812.63
  5. Step 5: Solve for x
    x = 79,079,629,812.63/321,487.48
  6. Step 6: Final answer
    x = 245,980.43

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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.