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Finding the Fourth Proportional to 252.39, 378.59 and 79.05

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Solution

The fourth proportional to 252.39, 378.59 and 79.05 is: 118.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    252.39 : 378.59 = 79.05 : x
  2. Step 2: Convert to fraction form
    252.39/378.59 = 79.05/x
  3. Step 3: Cross multiply
    252.39x = 378.59 × 79.05
  4. Step 4: Simplify right side
    252.39x = 29,926.43
  5. Step 5: Solve for x
    x = 29,926.43/252.39
  6. Step 6: Final answer
    x = 118.57

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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.