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Finding the Fourth Proportional to 216.93, 299.43 and 139.44

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Solution

The fourth proportional to 216.93, 299.43 and 139.44 is: 192.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    216.93 : 299.43 = 139.44 : x
  2. Step 2: Convert to fraction form
    216.93/299.43 = 139.44/x
  3. Step 3: Cross multiply
    216.93x = 299.43 × 139.44
  4. Step 4: Simplify right side
    216.93x = 41,752.52
  5. Step 5: Solve for x
    x = 41,752.52/216.93
  6. Step 6: Final answer
    x = 192.47

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.