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Finding the Fourth Proportional to 419,695.35, 629,665.61 and 135,379.59

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Solution

The fourth proportional to 419,695.35, 629,665.61 and 135,379.59 is: 203,108.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    419,695.35 : 629,665.61 = 135,379.59 : x
  2. Step 2: Convert to fraction form
    419,695.35/629,665.61 = 135,379.59/x
  3. Step 3: Cross multiply
    419,695.35x = 629,665.61 × 135,379.59
  4. Step 4: Simplify right side
    419,695.35x = 85,243,873,384.14
  5. Step 5: Solve for x
    x = 85,243,873,384.14/419,695.35
  6. Step 6: Final answer
    x = 203,108.93

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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.