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Finding the Fourth Proportional to 258.95, 357.39 and 148.43

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Solution

The fourth proportional to 258.95, 357.39 and 148.43 is: 204.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    258.95 : 357.39 = 148.43 : x
  2. Step 2: Convert to fraction form
    258.95/357.39 = 148.43/x
  3. Step 3: Cross multiply
    258.95x = 357.39 × 148.43
  4. Step 4: Simplify right side
    258.95x = 53,048.29
  5. Step 5: Solve for x
    x = 53,048.29/258.95
  6. Step 6: Final answer
    x = 204.86

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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.