Home / 419,989.05-629,808.40-131,726.42

Finding the Fourth Proportional to 419,989.05, 629,808.40 and 131,726.42

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Solution

The fourth proportional to 419,989.05, 629,808.40 and 131,726.42 is: 197,534.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    419,989.05 : 629,808.40 = 131,726.42 : x
  2. Step 2: Convert to fraction form
    419,989.05/629,808.40 = 131,726.42/x
  3. Step 3: Cross multiply
    419,989.05x = 629,808.40 × 131,726.42
  4. Step 4: Simplify right side
    419,989.05x = 82,962,405,817.93
  5. Step 5: Solve for x
    x = 82,962,405,817.93/419,989.05
  6. Step 6: Final answer
    x = 197,534.69

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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.