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Finding the Fourth Proportional to 216.93, 325.36 and 72.63

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Solution

The fourth proportional to 216.93, 325.36 and 72.63 is: 108.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    216.93 : 325.36 = 72.63 : x
  2. Step 2: Convert to fraction form
    216.93/325.36 = 72.63/x
  3. Step 3: Cross multiply
    216.93x = 325.36 × 72.63
  4. Step 4: Simplify right side
    216.93x = 23,630.90
  5. Step 5: Solve for x
    x = 23,630.90/216.93
  6. Step 6: Final answer
    x = 108.93

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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.