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Finding the Fourth Proportional to 386.35, 579.59 and 126.27

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Solution

The fourth proportional to 386.35, 579.59 and 126.27 is: 189.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    386.35 : 579.59 = 126.27 : x
  2. Step 2: Convert to fraction form
    386.35/579.59 = 126.27/x
  3. Step 3: Cross multiply
    386.35x = 579.59 × 126.27
  4. Step 4: Simplify right side
    386.35x = 73,184.83
  5. Step 5: Solve for x
    x = 73,184.83/386.35
  6. Step 6: Final answer
    x = 189.43

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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.