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Finding the Fourth Proportional to 286.90, 395.94 and 162.55

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Solution

The fourth proportional to 286.90, 395.94 and 162.55 is: 224.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    286.90 : 395.94 = 162.55 : x
  2. Step 2: Convert to fraction form
    286.90/395.94 = 162.55/x
  3. Step 3: Cross multiply
    286.90x = 395.94 × 162.55
  4. Step 4: Simplify right side
    286.90x = 64,360.05
  5. Step 5: Solve for x
    x = 64,360.05/286.90
  6. Step 6: Final answer
    x = 224.33

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.