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Finding the Fourth Proportional to 379.93, 524.45 and 255.66

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Solution

The fourth proportional to 379.93, 524.45 and 255.66 is: 352.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    379.93 : 524.45 = 255.66 : x
  2. Step 2: Convert to fraction form
    379.93/524.45 = 255.66/x
  3. Step 3: Cross multiply
    379.93x = 524.45 × 255.66
  4. Step 4: Simplify right side
    379.93x = 134,081.53
  5. Step 5: Solve for x
    x = 134,081.53/379.93
  6. Step 6: Final answer
    x = 352.91

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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.