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Finding the Fourth Proportional to 321,649.62, 443,811.87 and 194,331.66

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Solution

The fourth proportional to 321,649.62, 443,811.87 and 194,331.66 is: 268,138.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    321,649.62 : 443,811.87 = 194,331.66 : x
  2. Step 2: Convert to fraction form
    321,649.62/443,811.87 = 194,331.66/x
  3. Step 3: Cross multiply
    321,649.62x = 443,811.87 × 194,331.66
  4. Step 4: Simplify right side
    321,649.62x = 86,246,697,424.80
  5. Step 5: Solve for x
    x = 86,246,697,424.80/321,649.62
  6. Step 6: Final answer
    x = 268,138.66

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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.