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Finding the Fourth Proportional to 321,391.46, 443,523.49 and 178,153.94

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Solution

The fourth proportional to 321,391.46, 443,523.49 and 178,153.94 is: 245,854.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    321,391.46 : 443,523.49 = 178,153.94 : x
  2. Step 2: Convert to fraction form
    321,391.46/443,523.49 = 178,153.94/x
  3. Step 3: Cross multiply
    321,391.46x = 443,523.49 × 178,153.94
  4. Step 4: Simplify right side
    321,391.46x = 79,015,457,226.05
  5. Step 5: Solve for x
    x = 79,015,457,226.05/321,391.46
  6. Step 6: Final answer
    x = 245,854.25

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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.