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Finding the Fourth Proportional to 258.72, 357.01 and 153.85

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Solution

The fourth proportional to 258.72, 357.01 and 153.85 is: 212.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    258.72 : 357.01 = 153.85 : x
  2. Step 2: Convert to fraction form
    258.72/357.01 = 153.85/x
  3. Step 3: Cross multiply
    258.72x = 357.01 × 153.85
  4. Step 4: Simplify right side
    258.72x = 54,923.43
  5. Step 5: Solve for x
    x = 54,923.43/258.72
  6. Step 6: Final answer
    x = 212.29

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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.