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Finding the Fourth Proportional to 442,908.70, 664,427.85 and 143,338.30

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Solution

The fourth proportional to 442,908.70, 664,427.85 and 143,338.30 is: 215,028.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    442,908.70 : 664,427.85 = 143,338.30 : x
  2. Step 2: Convert to fraction form
    442,908.70/664,427.85 = 143,338.30/x
  3. Step 3: Cross multiply
    442,908.70x = 664,427.85 × 143,338.30
  4. Step 4: Simplify right side
    442,908.70x = 95,237,958,491.66
  5. Step 5: Solve for x
    x = 95,237,958,491.66/442,908.70
  6. Step 6: Final answer
    x = 215,028.42

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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.