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Finding the Fourth Proportional to 230.22, 345.03 and 138.95

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Solution

The fourth proportional to 230.22, 345.03 and 138.95 is: 208.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    230.22 : 345.03 = 138.95 : x
  2. Step 2: Convert to fraction form
    230.22/345.03 = 138.95/x
  3. Step 3: Cross multiply
    230.22x = 345.03 × 138.95
  4. Step 4: Simplify right side
    230.22x = 47,940.19
  5. Step 5: Solve for x
    x = 47,940.19/230.22
  6. Step 6: Final answer
    x = 208.24

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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.