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Finding the Fourth Proportional to 419,988.03, 629,806.88 and 131,725.40

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Solution

The fourth proportional to 419,988.03, 629,806.88 and 131,725.40 is: 197,533.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    419,988.03 : 629,806.88 = 131,725.40 : x
  2. Step 2: Convert to fraction form
    419,988.03/629,806.88 = 131,725.40/x
  3. Step 3: Cross multiply
    419,988.03x = 629,806.88 × 131,725.40
  4. Step 4: Simplify right side
    419,988.03x = 82,961,563,190.75
  5. Step 5: Solve for x
    x = 82,961,563,190.75/419,988.03
  6. Step 6: Final answer
    x = 197,533.16

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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.