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Finding the Fourth Proportional to 358.62, 537.83 and 139.17

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Solution

The fourth proportional to 358.62, 537.83 and 139.17 is: 208.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    358.62 : 537.83 = 139.17 : x
  2. Step 2: Convert to fraction form
    358.62/537.83 = 139.17/x
  3. Step 3: Cross multiply
    358.62x = 537.83 × 139.17
  4. Step 4: Simplify right side
    358.62x = 74,849.80
  5. Step 5: Solve for x
    x = 74,849.80/358.62
  6. Step 6: Final answer
    x = 208.72

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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.