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Finding the Fourth Proportional to 251.10, 376.63 and 68.47

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Solution

The fourth proportional to 251.10, 376.63 and 68.47 is: 102.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    251.10 : 376.63 = 68.47 : x
  2. Step 2: Convert to fraction form
    251.10/376.63 = 68.47/x
  3. Step 3: Cross multiply
    251.10x = 376.63 × 68.47
  4. Step 4: Simplify right side
    251.10x = 25,786.74
  5. Step 5: Solve for x
    x = 25,786.74/251.10
  6. Step 6: Final answer
    x = 102.70

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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.