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Finding the Fourth Proportional to 309.41, 463.81 and 126.85

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Solution

The fourth proportional to 309.41, 463.81 and 126.85 is: 190.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    309.41 : 463.81 = 126.85 : x
  2. Step 2: Convert to fraction form
    309.41/463.81 = 126.85/x
  3. Step 3: Cross multiply
    309.41x = 463.81 × 126.85
  4. Step 4: Simplify right side
    309.41x = 58,834.30
  5. Step 5: Solve for x
    x = 58,834.30/309.41
  6. Step 6: Final answer
    x = 190.15

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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.