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Finding the Fourth Proportional to 151.56, 208.80 and 144.36

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Solution

The fourth proportional to 151.56, 208.80 and 144.36 is: 198.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    151.56 : 208.80 = 144.36 : x
  2. Step 2: Convert to fraction form
    151.56/208.80 = 144.36/x
  3. Step 3: Cross multiply
    151.56x = 208.80 × 144.36
  4. Step 4: Simplify right side
    151.56x = 30,142.37
  5. Step 5: Solve for x
    x = 30,142.37/151.56
  6. Step 6: Final answer
    x = 198.88

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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.