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Finding the Fourth Proportional to 358.31, 537.55 and 127.22

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Solution

The fourth proportional to 358.31, 537.55 and 127.22 is: 190.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    358.31 : 537.55 = 127.22 : x
  2. Step 2: Convert to fraction form
    358.31/537.55 = 127.22/x
  3. Step 3: Cross multiply
    358.31x = 537.55 × 127.22
  4. Step 4: Simplify right side
    358.31x = 68,384.11
  5. Step 5: Solve for x
    x = 68,384.11/358.31
  6. Step 6: Final answer
    x = 190.85

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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.