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Finding the Fourth Proportional to 442,940.20, 664,475.10 and 143,369.80

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Solution

The fourth proportional to 442,940.20, 664,475.10 and 143,369.80 is: 215,075.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    442,940.20 : 664,475.10 = 143,369.80 : x
  2. Step 2: Convert to fraction form
    442,940.20/664,475.10 = 143,369.80/x
  3. Step 3: Cross multiply
    442,940.20x = 664,475.10 × 143,369.80
  4. Step 4: Simplify right side
    442,940.20x = 95,265,662,191.98
  5. Step 5: Solve for x
    x = 95,265,662,191.98/442,940.20
  6. Step 6: Final answer
    x = 215,075.67

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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.