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Finding the Fourth Proportional to 436,257.20, 654,400.38 and 120,687.68

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Solution

The fourth proportional to 436,257.20, 654,400.38 and 120,687.68 is: 181,035.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    436,257.20 : 654,400.38 = 120,687.68 : x
  2. Step 2: Convert to fraction form
    436,257.20/654,400.38 = 120,687.68/x
  3. Step 3: Cross multiply
    436,257.20x = 654,400.38 × 120,687.68
  4. Step 4: Simplify right side
    436,257.20x = 78,978,063,653.32
  5. Step 5: Solve for x
    x = 78,978,063,653.32/436,257.20
  6. Step 6: Final answer
    x = 181,035.55

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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.