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Finding the Fourth Proportional to 431,616.80, 647,611.77 and 231,703.73

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Solution

The fourth proportional to 431,616.80, 647,611.77 and 231,703.73 is: 347,655.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    431,616.80 : 647,611.77 = 231,703.73 : x
  2. Step 2: Convert to fraction form
    431,616.80/647,611.77 = 231,703.73/x
  3. Step 3: Cross multiply
    431,616.80x = 647,611.77 × 231,703.73
  4. Step 4: Simplify right side
    431,616.80x = 150,054,062,700.90
  5. Step 5: Solve for x
    x = 150,054,062,700.90/431,616.80
  6. Step 6: Final answer
    x = 347,655.75

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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.