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Finding the Fourth Proportional to 205,081.20, 307,621.80 and 192,615.30

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Solution

The fourth proportional to 205,081.20, 307,621.80 and 192,615.30 is: 288,922.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    205,081.20 : 307,621.80 = 192,615.30 : x
  2. Step 2: Convert to fraction form
    205,081.20/307,621.80 = 192,615.30/x
  3. Step 3: Cross multiply
    205,081.20x = 307,621.80 × 192,615.30
  4. Step 4: Simplify right side
    205,081.20x = 59,252,665,293.54
  5. Step 5: Solve for x
    x = 59,252,665,293.54/205,081.20
  6. Step 6: Final answer
    x = 288,922.95

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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.