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Finding the Fourth Proportional to 151.39, 207.55 and 147.31

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Solution

The fourth proportional to 151.39, 207.55 and 147.31 is: 201.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    151.39 : 207.55 = 147.31 : x
  2. Step 2: Convert to fraction form
    151.39/207.55 = 147.31/x
  3. Step 3: Cross multiply
    151.39x = 207.55 × 147.31
  4. Step 4: Simplify right side
    151.39x = 30,574.19
  5. Step 5: Solve for x
    x = 30,574.19/151.39
  6. Step 6: Final answer
    x = 201.96

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.