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Finding the Fourth Proportional to 331,790.80, 497,686.20 and 205,819.60

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Solution

The fourth proportional to 331,790.80, 497,686.20 and 205,819.60 is: 308,729.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    331,790.80 : 497,686.20 = 205,819.60 : x
  2. Step 2: Convert to fraction form
    331,790.80/497,686.20 = 205,819.60/x
  3. Step 3: Cross multiply
    331,790.80x = 497,686.20 × 205,819.60
  4. Step 4: Simplify right side
    331,790.80x = 102,433,574,609.52
  5. Step 5: Solve for x
    x = 102,433,574,609.52/331,790.80
  6. Step 6: Final answer
    x = 308,729.40

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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.