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Finding the Fourth Proportional to 252.00, 378 and 78.69

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Solution

The fourth proportional to 252.00, 378 and 78.69 is: 118.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    252.00 : 378 = 78.69 : x
  2. Step 2: Convert to fraction form
    252.00/378 = 78.69/x
  3. Step 3: Cross multiply
    252.00x = 378 × 78.69
  4. Step 4: Simplify right side
    252.00x = 29,744.82
  5. Step 5: Solve for x
    x = 29,744.82/252.00
  6. Step 6: Final answer
    x = 118.04

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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.