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Finding the Fourth Proportional to 321,391.96, 443,524.18 and 178,154.44

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Solution

The fourth proportional to 321,391.96, 443,524.18 and 178,154.44 is: 245,854.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    321,391.96 : 443,524.18 = 178,154.44 : x
  2. Step 2: Convert to fraction form
    321,391.96/443,524.18 = 178,154.44/x
  3. Step 3: Cross multiply
    321,391.96x = 443,524.18 × 178,154.44
  4. Step 4: Simplify right side
    321,391.96x = 79,015,801,914.36
  5. Step 5: Solve for x
    x = 79,015,801,914.36/321,391.96
  6. Step 6: Final answer
    x = 245,854.94

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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.