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Finding the Fourth Proportional to 242.63, 334.82 and 139.13

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Solution

The fourth proportional to 242.63, 334.82 and 139.13 is: 191.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    242.63 : 334.82 = 139.13 : x
  2. Step 2: Convert to fraction form
    242.63/334.82 = 139.13/x
  3. Step 3: Cross multiply
    242.63x = 334.82 × 139.13
  4. Step 4: Simplify right side
    242.63x = 46,583.51
  5. Step 5: Solve for x
    x = 46,583.51/242.63
  6. Step 6: Final answer
    x = 191.99

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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.