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Finding the Fourth Proportional to 442,850.20, 664,340.10 and 143,279.80

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Solution

The fourth proportional to 442,850.20, 664,340.10 and 143,279.80 is: 214,940.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    442,850.20 : 664,340.10 = 143,279.80 : x
  2. Step 2: Convert to fraction form
    442,850.20/664,340.10 = 143,279.80/x
  3. Step 3: Cross multiply
    442,850.20x = 664,340.10 × 143,279.80
  4. Step 4: Simplify right side
    442,850.20x = 95,186,516,659.98
  5. Step 5: Solve for x
    x = 95,186,516,659.98/442,850.20
  6. Step 6: Final answer
    x = 214,940.67

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.