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Finding the Fourth Proportional to 258.83, 357.21 and 148.33

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Solution

The fourth proportional to 258.83, 357.21 and 148.33 is: 204.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    258.83 : 357.21 = 148.33 : x
  2. Step 2: Convert to fraction form
    258.83/357.21 = 148.33/x
  3. Step 3: Cross multiply
    258.83x = 357.21 × 148.33
  4. Step 4: Simplify right side
    258.83x = 52,984.07
  5. Step 5: Solve for x
    x = 52,984.07/258.83
  6. Step 6: Final answer
    x = 204.71

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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.