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Finding the Fourth Proportional to 255.45, 352.50 and 144.90

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Solution

The fourth proportional to 255.45, 352.50 and 144.90 is: 199.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    255.45 : 352.50 = 144.90 : x
  2. Step 2: Convert to fraction form
    255.45/352.50 = 144.90/x
  3. Step 3: Cross multiply
    255.45x = 352.50 × 144.90
  4. Step 4: Simplify right side
    255.45x = 51,077.25
  5. Step 5: Solve for x
    x = 51,077.25/255.45
  6. Step 6: Final answer
    x = 199.95

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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.