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Finding the Fourth Proportional to 151.62, 208.60 and 147.75

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Solution

The fourth proportional to 151.62, 208.60 and 147.75 is: 203.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    151.62 : 208.60 = 147.75 : x
  2. Step 2: Convert to fraction form
    151.62/208.60 = 147.75/x
  3. Step 3: Cross multiply
    151.62x = 208.60 × 147.75
  4. Step 4: Simplify right side
    151.62x = 30,820.65
  5. Step 5: Solve for x
    x = 30,820.65/151.62
  6. Step 6: Final answer
    x = 203.28

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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.