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Finding the Fourth Proportional to 442,854.20, 664,367.70 and 190,134.20

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Solution

The fourth proportional to 442,854.20, 664,367.70 and 190,134.20 is: 285,238.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    442,854.20 : 664,367.70 = 190,134.20 : x
  2. Step 2: Convert to fraction form
    442,854.20/664,367.70 = 190,134.20/x
  3. Step 3: Cross multiply
    442,854.20x = 664,367.70 × 190,134.20
  4. Step 4: Simplify right side
    442,854.20x = 126,319,021,145.34
  5. Step 5: Solve for x
    x = 126,319,021,145.34/442,854.20
  6. Step 6: Final answer
    x = 285,238.39

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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.