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Finding the Fourth Proportional to 419,989.47, 629,809.03 and 131,726.84

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Solution

The fourth proportional to 419,989.47, 629,809.03 and 131,726.84 is: 197,535.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    419,989.47 : 629,809.03 = 131,726.84 : x
  2. Step 2: Convert to fraction form
    419,989.47/629,809.03 = 131,726.84/x
  3. Step 3: Cross multiply
    419,989.47x = 629,809.03 × 131,726.84
  4. Step 4: Simplify right side
    419,989.47x = 82,962,754,570.57
  5. Step 5: Solve for x
    x = 82,962,754,570.57/419,989.47
  6. Step 6: Final answer
    x = 197,535.32

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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.