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Finding the Fourth Proportional to 442,817.70, 664,226.55 and 218,212.80

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Solution

The fourth proportional to 442,817.70, 664,226.55 and 218,212.80 is: 327,319.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    442,817.70 : 664,226.55 = 218,212.80 : x
  2. Step 2: Convert to fraction form
    442,817.70/664,226.55 = 218,212.80/x
  3. Step 3: Cross multiply
    442,817.70x = 664,226.55 × 218,212.80
  4. Step 4: Simplify right side
    442,817.70x = 144,942,735,309.84
  5. Step 5: Solve for x
    x = 144,942,735,309.84/442,817.70
  6. Step 6: Final answer
    x = 327,319.20

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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.