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Finding the Fourth Proportional to 397,770.50, 548,923.38 and 218,922.50

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Solution

The fourth proportional to 397,770.50, 548,923.38 and 218,922.50 is: 302,113.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    397,770.50 : 548,923.38 = 218,922.50 : x
  2. Step 2: Convert to fraction form
    397,770.50/548,923.38 = 218,922.50/x
  3. Step 3: Cross multiply
    397,770.50x = 548,923.38 × 218,922.50
  4. Step 4: Simplify right side
    397,770.50x = 120,171,678,658.05
  5. Step 5: Solve for x
    x = 120,171,678,658.05/397,770.50
  6. Step 6: Final answer
    x = 302,113.10

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.