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Finding the Fourth Proportional to 183.16, 274.49 and 139.87

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Solution

The fourth proportional to 183.16, 274.49 and 139.87 is: 209.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    183.16 : 274.49 = 139.87 : x
  2. Step 2: Convert to fraction form
    183.16/274.49 = 139.87/x
  3. Step 3: Cross multiply
    183.16x = 274.49 × 139.87
  4. Step 4: Simplify right side
    183.16x = 38,390.84
  5. Step 5: Solve for x
    x = 38,390.84/183.16
  6. Step 6: Final answer
    x = 209.61

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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.