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Finding the Fourth Proportional to 213.87, 321.08 and 162.84

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Solution

The fourth proportional to 213.87, 321.08 and 162.84 is: 244.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    213.87 : 321.08 = 162.84 : x
  2. Step 2: Convert to fraction form
    213.87/321.08 = 162.84/x
  3. Step 3: Cross multiply
    213.87x = 321.08 × 162.84
  4. Step 4: Simplify right side
    213.87x = 52,284.67
  5. Step 5: Solve for x
    x = 52,284.67/213.87
  6. Step 6: Final answer
    x = 244.47

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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.