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Finding the Fourth Proportional to 216.93, 324.60 and 186.86

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Solution

The fourth proportional to 216.93, 324.60 and 186.86 is: 279.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    216.93 : 324.60 = 186.86 : x
  2. Step 2: Convert to fraction form
    216.93/324.60 = 186.86/x
  3. Step 3: Cross multiply
    216.93x = 324.60 × 186.86
  4. Step 4: Simplify right side
    216.93x = 60,653.13
  5. Step 5: Solve for x
    x = 60,653.13/216.93
  6. Step 6: Final answer
    x = 279.60

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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.