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Finding the Fourth Proportional to 251.90, 377.90 and 107.63

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Solution

The fourth proportional to 251.90, 377.90 and 107.63 is: 161.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    251.90 : 377.90 = 107.63 : x
  2. Step 2: Convert to fraction form
    251.90/377.90 = 107.63/x
  3. Step 3: Cross multiply
    251.90x = 377.90 × 107.63
  4. Step 4: Simplify right side
    251.90x = 40,671.76
  5. Step 5: Solve for x
    x = 40,671.76/251.90
  6. Step 6: Final answer
    x = 161.46

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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.