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Finding the Fourth Proportional to 258.39, 356.55 and 147.88

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Solution

The fourth proportional to 258.39, 356.55 and 147.88 is: 204.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    258.39 : 356.55 = 147.88 : x
  2. Step 2: Convert to fraction form
    258.39/356.55 = 147.88/x
  3. Step 3: Cross multiply
    258.39x = 356.55 × 147.88
  4. Step 4: Simplify right side
    258.39x = 52,725.33
  5. Step 5: Solve for x
    x = 52,725.33/258.39
  6. Step 6: Final answer
    x = 204.05

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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.