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Finding the Fourth Proportional to 321,662.40, 443,885.55 and 185,691.75

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Solution

The fourth proportional to 321,662.40, 443,885.55 and 185,691.75 is: 256,249.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    321,662.40 : 443,885.55 = 185,691.75 : x
  2. Step 2: Convert to fraction form
    321,662.40/443,885.55 = 185,691.75/x
  3. Step 3: Cross multiply
    321,662.40x = 443,885.55 × 185,691.75
  4. Step 4: Simplify right side
    321,662.40x = 82,425,884,579.21
  5. Step 5: Solve for x
    x = 82,425,884,579.21/321,662.40
  6. Step 6: Final answer
    x = 256,249.67

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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.