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Finding the Fourth Proportional to 251.64, 379.40 and 248.40

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Solution

The fourth proportional to 251.64, 379.40 and 248.40 is: 374.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    251.64 : 379.40 = 248.40 : x
  2. Step 2: Convert to fraction form
    251.64/379.40 = 248.40/x
  3. Step 3: Cross multiply
    251.64x = 379.40 × 248.40
  4. Step 4: Simplify right side
    251.64x = 94,241.72
  5. Step 5: Solve for x
    x = 94,241.72/251.64
  6. Step 6: Final answer
    x = 374.51

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.