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Finding the Fourth Proportional to 379.96, 524.55 and 286.54

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Solution

The fourth proportional to 379.96, 524.55 and 286.54 is: 395.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    379.96 : 524.55 = 286.54 : x
  2. Step 2: Convert to fraction form
    379.96/524.55 = 286.54/x
  3. Step 3: Cross multiply
    379.96x = 524.55 × 286.54
  4. Step 4: Simplify right side
    379.96x = 150,304.56
  5. Step 5: Solve for x
    x = 150,304.56/379.96
  6. Step 6: Final answer
    x = 395.58

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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.