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Finding the Fourth Proportional to 358.05, 537.30 and 211.80

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Solution

The fourth proportional to 358.05, 537.30 and 211.80 is: 317.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    358.05 : 537.30 = 211.80 : x
  2. Step 2: Convert to fraction form
    358.05/537.30 = 211.80/x
  3. Step 3: Cross multiply
    358.05x = 537.30 × 211.80
  4. Step 4: Simplify right side
    358.05x = 113,800.14
  5. Step 5: Solve for x
    x = 113,800.14/358.05
  6. Step 6: Final answer
    x = 317.83

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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.