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Finding the Fourth Proportional to 303,791.80, 455,687.70 and 145,982.20

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Solution

The fourth proportional to 303,791.80, 455,687.70 and 145,982.20 is: 218,973.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    303,791.80 : 455,687.70 = 145,982.20 : x
  2. Step 2: Convert to fraction form
    303,791.80/455,687.70 = 145,982.20/x
  3. Step 3: Cross multiply
    303,791.80x = 455,687.70 × 145,982.20
  4. Step 4: Simplify right side
    303,791.80x = 66,522,292,958.94
  5. Step 5: Solve for x
    x = 66,522,292,958.94/303,791.80
  6. Step 6: Final answer
    x = 218,973.30

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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.