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Finding the Fourth Proportional to 258.01, 388.89 and 231.59

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Solution

The fourth proportional to 258.01, 388.89 and 231.59 is: 349.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    258.01 : 388.89 = 231.59 : x
  2. Step 2: Convert to fraction form
    258.01/388.89 = 231.59/x
  3. Step 3: Cross multiply
    258.01x = 388.89 × 231.59
  4. Step 4: Simplify right side
    258.01x = 90,064.01
  5. Step 5: Solve for x
    x = 90,064.01/258.01
  6. Step 6: Final answer
    x = 349.08

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.