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Finding the Fourth Proportional to 205,388.80, 308,083.20 and 126,246.40

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Solution

The fourth proportional to 205,388.80, 308,083.20 and 126,246.40 is: 189,369.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    205,388.80 : 308,083.20 = 126,246.40 : x
  2. Step 2: Convert to fraction form
    205,388.80/308,083.20 = 126,246.40/x
  3. Step 3: Cross multiply
    205,388.80x = 308,083.20 × 126,246.40
  4. Step 4: Simplify right side
    205,388.80x = 38,894,394,900.48
  5. Step 5: Solve for x
    x = 38,894,394,900.48/205,388.80
  6. Step 6: Final answer
    x = 189,369.60

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1.5x scale

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.