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Finding the Fourth Proportional to 255.40, 352.38 and 151.92

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Solution

The fourth proportional to 255.40, 352.38 and 151.92 is: 209.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    255.40 : 352.38 = 151.92 : x
  2. Step 2: Convert to fraction form
    255.40/352.38 = 151.92/x
  3. Step 3: Cross multiply
    255.40x = 352.38 × 151.92
  4. Step 4: Simplify right side
    255.40x = 53,533.57
  5. Step 5: Solve for x
    x = 53,533.57/255.40
  6. Step 6: Final answer
    x = 209.61

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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.