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Finding the Fourth Proportional to 258.96, 388.44 and 88.08

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Solution

The fourth proportional to 258.96, 388.44 and 88.08 is: 132.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    258.96 : 388.44 = 88.08 : x
  2. Step 2: Convert to fraction form
    258.96/388.44 = 88.08/x
  3. Step 3: Cross multiply
    258.96x = 388.44 × 88.08
  4. Step 4: Simplify right side
    258.96x = 34,213.80
  5. Step 5: Solve for x
    x = 34,213.80/258.96
  6. Step 6: Final answer
    x = 132.12

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.