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Finding the Fourth Proportional to 303,605.80, 455,408.70 and 145,796.20

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Solution

The fourth proportional to 303,605.80, 455,408.70 and 145,796.20 is: 218,694.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    303,605.80 : 455,408.70 = 145,796.20 : x
  2. Step 2: Convert to fraction form
    303,605.80/455,408.70 = 145,796.20/x
  3. Step 3: Cross multiply
    303,605.80x = 455,408.70 × 145,796.20
  4. Step 4: Simplify right side
    303,605.80x = 66,396,857,906.94
  5. Step 5: Solve for x
    x = 66,396,857,906.94/303,605.80
  6. Step 6: Final answer
    x = 218,694.30

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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.