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Finding the Fourth Proportional to 25, 34.59 and 22.08

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Solution

The fourth proportional to 25, 34.59 and 22.08 is: 30.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    25 : 34.59 = 22.08 : x
  2. Step 2: Convert to fraction form
    25/34.59 = 22.08/x
  3. Step 3: Cross multiply
    25x = 34.59 × 22.08
  4. Step 4: Simplify right side
    25x = 763.75
  5. Step 5: Solve for x
    x = 763.75/25
  6. Step 6: Final answer
    x = 30.55

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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.