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Finding the Fourth Proportional to 216.87, 325.98 and 206.07

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Solution

The fourth proportional to 216.87, 325.98 and 206.07 is: 309.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    216.87 : 325.98 = 206.07 : x
  2. Step 2: Convert to fraction form
    216.87/325.98 = 206.07/x
  3. Step 3: Cross multiply
    216.87x = 325.98 × 206.07
  4. Step 4: Simplify right side
    216.87x = 67,174.70
  5. Step 5: Solve for x
    x = 67,174.70/216.87
  6. Step 6: Final answer
    x = 309.75

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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.