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Finding the Fourth Proportional to 251.35, 376.93 and 129.60

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Solution

The fourth proportional to 251.35, 376.93 and 129.60 is: 194.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    251.35 : 376.93 = 129.60 : x
  2. Step 2: Convert to fraction form
    251.35/376.93 = 129.60/x
  3. Step 3: Cross multiply
    251.35x = 376.93 × 129.60
  4. Step 4: Simplify right side
    251.35x = 48,850.13
  5. Step 5: Solve for x
    x = 48,850.13/251.35
  6. Step 6: Final answer
    x = 194.35

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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.