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Finding the Fourth Proportional to 325,638.20, 488,530.20 and 125,940.80

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Solution

The fourth proportional to 325,638.20, 488,530.20 and 125,940.80 is: 188,939.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    325,638.20 : 488,530.20 = 125,940.80 : x
  2. Step 2: Convert to fraction form
    325,638.20/488,530.20 = 125,940.80/x
  3. Step 3: Cross multiply
    325,638.20x = 488,530.20 × 125,940.80
  4. Step 4: Simplify right side
    325,638.20x = 61,525,884,212.16
  5. Step 5: Solve for x
    x = 61,525,884,212.16/325,638.20
  6. Step 6: Final answer
    x = 188,939.39

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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.