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Finding the Fourth Proportional to 255.66, 352.79 and 145.12

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Solution

The fourth proportional to 255.66, 352.79 and 145.12 is: 200.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    255.66 : 352.79 = 145.12 : x
  2. Step 2: Convert to fraction form
    255.66/352.79 = 145.12/x
  3. Step 3: Cross multiply
    255.66x = 352.79 × 145.12
  4. Step 4: Simplify right side
    255.66x = 51,196.37
  5. Step 5: Solve for x
    x = 51,196.37/255.66
  6. Step 6: Final answer
    x = 200.25

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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.