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Finding the Fourth Proportional to 321,660.89, 443,892.45 and 178,420.92

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Solution

The fourth proportional to 321,660.89, 443,892.45 and 178,420.92 is: 246,221.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    321,660.89 : 443,892.45 = 178,420.92 : x
  2. Step 2: Convert to fraction form
    321,660.89/443,892.45 = 178,420.92/x
  3. Step 3: Cross multiply
    321,660.89x = 443,892.45 × 178,420.92
  4. Step 4: Simplify right side
    321,660.89x = 79,199,699,310.05
  5. Step 5: Solve for x
    x = 79,199,699,310.05/321,660.89
  6. Step 6: Final answer
    x = 246,221.11

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1.5x scale

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.