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Finding the Fourth Proportional to 263.43, 394.94 and 126.40

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Solution

The fourth proportional to 263.43, 394.94 and 126.40 is: 189.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    263.43 : 394.94 = 126.40 : x
  2. Step 2: Convert to fraction form
    263.43/394.94 = 126.40/x
  3. Step 3: Cross multiply
    263.43x = 394.94 × 126.40
  4. Step 4: Simplify right side
    263.43x = 49,920.49
  5. Step 5: Solve for x
    x = 49,920.49/263.43
  6. Step 6: Final answer
    x = 189.50

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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.