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Finding the Fourth Proportional to 358.88, 537.96 and 127.68

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Solution

The fourth proportional to 358.88, 537.96 and 127.68 is: 191.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    358.88 : 537.96 = 127.68 : x
  2. Step 2: Convert to fraction form
    358.88/537.96 = 127.68/x
  3. Step 3: Cross multiply
    358.88x = 537.96 × 127.68
  4. Step 4: Simplify right side
    358.88x = 68,686.73
  5. Step 5: Solve for x
    x = 68,686.73/358.88
  6. Step 6: Final answer
    x = 191.39

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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.