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Finding the Fourth Proportional to 436,212.10, 654,318.12 and 120,660.79

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Solution

The fourth proportional to 436,212.10, 654,318.12 and 120,660.79 is: 180,991.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    436,212.10 : 654,318.12 = 120,660.79 : x
  2. Step 2: Convert to fraction form
    436,212.10/654,318.12 = 120,660.79/x
  3. Step 3: Cross multiply
    436,212.10x = 654,318.12 × 120,660.79
  4. Step 4: Simplify right side
    436,212.10x = 78,950,541,270.51
  5. Step 5: Solve for x
    x = 78,950,541,270.51/436,212.10
  6. Step 6: Final answer
    x = 180,991.18

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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.