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Finding the Fourth Proportional to 230.24, 344.60 and 139.11

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Solution

The fourth proportional to 230.24, 344.60 and 139.11 is: 208.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    230.24 : 344.60 = 139.11 : x
  2. Step 2: Convert to fraction form
    230.24/344.60 = 139.11/x
  3. Step 3: Cross multiply
    230.24x = 344.60 × 139.11
  4. Step 4: Simplify right side
    230.24x = 47,936.61
  5. Step 5: Solve for x
    x = 47,936.61/230.24
  6. Step 6: Final answer
    x = 208.21

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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.