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Finding the Fourth Proportional to 253.54, 379.80 and 116.39

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Solution

The fourth proportional to 253.54, 379.80 and 116.39 is: 174.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    253.54 : 379.80 = 116.39 : x
  2. Step 2: Convert to fraction form
    253.54/379.80 = 116.39/x
  3. Step 3: Cross multiply
    253.54x = 379.80 × 116.39
  4. Step 4: Simplify right side
    253.54x = 44,205.29
  5. Step 5: Solve for x
    x = 44,205.29/253.54
  6. Step 6: Final answer
    x = 174.36

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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.