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Finding the Fourth Proportional to 447,940.80, 671,911.20 and 132,400.80

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Solution

The fourth proportional to 447,940.80, 671,911.20 and 132,400.80 is: 198,601.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    447,940.80 : 671,911.20 = 132,400.80 : x
  2. Step 2: Convert to fraction form
    447,940.80/671,911.20 = 132,400.80/x
  3. Step 3: Cross multiply
    447,940.80x = 671,911.20 × 132,400.80
  4. Step 4: Simplify right side
    447,940.80x = 88,961,580,408.96
  5. Step 5: Solve for x
    x = 88,961,580,408.96/447,940.80
  6. Step 6: Final answer
    x = 198,601.20

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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.