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Finding the Fourth Proportional to 259,285.88, 388,994.43 and 72,297.38

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Solution

The fourth proportional to 259,285.88, 388,994.43 and 72,297.38 is: 108,464.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    259,285.88 : 388,994.43 = 72,297.38 : x
  2. Step 2: Convert to fraction form
    259,285.88/388,994.43 = 72,297.38/x
  3. Step 3: Cross multiply
    259,285.88x = 388,994.43 × 72,297.38
  4. Step 4: Simplify right side
    259,285.88x = 28,123,276,178.62
  5. Step 5: Solve for x
    x = 28,123,276,178.62/259,285.88
  6. Step 6: Final answer
    x = 108,464.36

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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.