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Finding the Fourth Proportional to 442,812.80, 664,219.20 and 396,156.80

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Solution

The fourth proportional to 442,812.80, 664,219.20 and 396,156.80 is: 594,235.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    442,812.80 : 664,219.20 = 396,156.80 : x
  2. Step 2: Convert to fraction form
    442,812.80/664,219.20 = 396,156.80/x
  3. Step 3: Cross multiply
    442,812.80x = 664,219.20 × 396,156.80
  4. Step 4: Simplify right side
    442,812.80x = 263,134,952,770.56
  5. Step 5: Solve for x
    x = 263,134,952,770.56/442,812.80
  6. Step 6: Final answer
    x = 594,235.20

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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.