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Finding the Fourth Proportional to 325,704.20, 488,556.30 and 138,734.60

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Solution

The fourth proportional to 325,704.20, 488,556.30 and 138,734.60 is: 208,101.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    325,704.20 : 488,556.30 = 138,734.60 : x
  2. Step 2: Convert to fraction form
    325,704.20/488,556.30 = 138,734.60/x
  3. Step 3: Cross multiply
    325,704.20x = 488,556.30 × 138,734.60
  4. Step 4: Simplify right side
    325,704.20x = 67,779,662,857.98
  5. Step 5: Solve for x
    x = 67,779,662,857.98/325,704.20
  6. Step 6: Final answer
    x = 208,101.90

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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.