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Finding the Fourth Proportional to 379,286.57, 568,969.88 and 126,478.95

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Solution

The fourth proportional to 379,286.57, 568,969.88 and 126,478.95 is: 189,731.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    379,286.57 : 568,969.88 = 126,478.95 : x
  2. Step 2: Convert to fraction form
    379,286.57/568,969.88 = 126,478.95/x
  3. Step 3: Cross multiply
    379,286.57x = 568,969.88 × 126,478.95
  4. Step 4: Simplify right side
    379,286.57x = 71,962,712,371.63
  5. Step 5: Solve for x
    x = 71,962,712,371.63/379,286.57
  6. Step 6: Final answer
    x = 189,731.77

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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.