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Finding the Fourth Proportional to 358.62, 537.60 and 221.70

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Solution

The fourth proportional to 358.62, 537.60 and 221.70 is: 332.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    358.62 : 537.60 = 221.70 : x
  2. Step 2: Convert to fraction form
    358.62/537.60 = 221.70/x
  3. Step 3: Cross multiply
    358.62x = 537.60 × 221.70
  4. Step 4: Simplify right side
    358.62x = 119,185.92
  5. Step 5: Solve for x
    x = 119,185.92/358.62
  6. Step 6: Final answer
    x = 332.35

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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.