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Finding the Fourth Proportional to 309.22, 463.83 and 126.57

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Solution

The fourth proportional to 309.22, 463.83 and 126.57 is: 189.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    309.22 : 463.83 = 126.57 : x
  2. Step 2: Convert to fraction form
    309.22/463.83 = 126.57/x
  3. Step 3: Cross multiply
    309.22x = 463.83 × 126.57
  4. Step 4: Simplify right side
    309.22x = 58,705.94
  5. Step 5: Solve for x
    x = 58,705.94/309.22
  6. Step 6: Final answer
    x = 189.85

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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.