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Finding the Fourth Proportional to 242.59, 334.72 and 139.09

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Solution

The fourth proportional to 242.59, 334.72 and 139.09 is: 191.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    242.59 : 334.72 = 139.09 : x
  2. Step 2: Convert to fraction form
    242.59/334.72 = 139.09/x
  3. Step 3: Cross multiply
    242.59x = 334.72 × 139.09
  4. Step 4: Simplify right side
    242.59x = 46,556.20
  5. Step 5: Solve for x
    x = 46,556.20/242.59
  6. Step 6: Final answer
    x = 191.91

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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.