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Finding the Fourth Proportional to 321,630.66, 443,812.23 and 178,355.70

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Solution

The fourth proportional to 321,630.66, 443,812.23 and 178,355.70 is: 246,109.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    321,630.66 : 443,812.23 = 178,355.70 : x
  2. Step 2: Convert to fraction form
    321,630.66/443,812.23 = 178,355.70/x
  3. Step 3: Cross multiply
    321,630.66x = 443,812.23 × 178,355.70
  4. Step 4: Simplify right side
    321,630.66x = 79,156,440,950.21
  5. Step 5: Solve for x
    x = 79,156,440,950.21/321,630.66
  6. Step 6: Final answer
    x = 246,109.75

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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.