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Finding the Fourth Proportional to 286.72, 430.26 and 165.22

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Solution

The fourth proportional to 286.72, 430.26 and 165.22 is: 247.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    286.72 : 430.26 = 165.22 : x
  2. Step 2: Convert to fraction form
    286.72/430.26 = 165.22/x
  3. Step 3: Cross multiply
    286.72x = 430.26 × 165.22
  4. Step 4: Simplify right side
    286.72x = 71,087.56
  5. Step 5: Solve for x
    x = 71,087.56/286.72
  6. Step 6: Final answer
    x = 247.93

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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.