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Finding the Fourth Proportional to 216.68, 325.49 and 186.71

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Solution

The fourth proportional to 216.68, 325.49 and 186.71 is: 280.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    216.68 : 325.49 = 186.71 : x
  2. Step 2: Convert to fraction form
    216.68/325.49 = 186.71/x
  3. Step 3: Cross multiply
    216.68x = 325.49 × 186.71
  4. Step 4: Simplify right side
    216.68x = 60,769.68
  5. Step 5: Solve for x
    x = 60,769.68/216.68
  6. Step 6: Final answer
    x = 280.46

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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.