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Finding the Fourth Proportional to 442,918.20, 664,442.10 and 143,347.80

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Solution

The fourth proportional to 442,918.20, 664,442.10 and 143,347.80 is: 215,042.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    442,918.20 : 664,442.10 = 143,347.80 : x
  2. Step 2: Convert to fraction form
    442,918.20/664,442.10 = 143,347.80/x
  3. Step 3: Cross multiply
    442,918.20x = 664,442.10 × 143,347.80
  4. Step 4: Simplify right side
    442,918.20x = 95,246,313,262.38
  5. Step 5: Solve for x
    x = 95,246,313,262.38/442,918.20
  6. Step 6: Final answer
    x = 215,042.67

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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.