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Finding the Fourth Proportional to 255.78, 352.94 and 145.24

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Solution

The fourth proportional to 255.78, 352.94 and 145.24 is: 200.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    255.78 : 352.94 = 145.24 : x
  2. Step 2: Convert to fraction form
    255.78/352.94 = 145.24/x
  3. Step 3: Cross multiply
    255.78x = 352.94 × 145.24
  4. Step 4: Simplify right side
    255.78x = 51,261.01
  5. Step 5: Solve for x
    x = 51,261.01/255.78
  6. Step 6: Final answer
    x = 200.41

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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.