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Finding the Fourth Proportional to 183.16, 274.46 and 139.76

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Solution

The fourth proportional to 183.16, 274.46 and 139.76 is: 209.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    183.16 : 274.46 = 139.76 : x
  2. Step 2: Convert to fraction form
    183.16/274.46 = 139.76/x
  3. Step 3: Cross multiply
    183.16x = 274.46 × 139.76
  4. Step 4: Simplify right side
    183.16x = 38,358.53
  5. Step 5: Solve for x
    x = 38,358.53/183.16
  6. Step 6: Final answer
    x = 209.43

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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.