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Finding the Fourth Proportional to 321,638.17, 443,860.92 and 178,399.24

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Solution

The fourth proportional to 321,638.17, 443,860.92 and 178,399.24 is: 246,191.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    321,638.17 : 443,860.92 = 178,399.24 : x
  2. Step 2: Convert to fraction form
    321,638.17/443,860.92 = 178,399.24/x
  3. Step 3: Cross multiply
    321,638.17x = 443,860.92 × 178,399.24
  4. Step 4: Simplify right side
    321,638.17x = 79,184,449,015.05
  5. Step 5: Solve for x
    x = 79,184,449,015.05/321,638.17
  6. Step 6: Final answer
    x = 246,191.08

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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.