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Finding the Fourth Proportional to 229.08, 343.80 and 138

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Solution

The fourth proportional to 229.08, 343.80 and 138 is: 207.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    229.08 : 343.80 = 138 : x
  2. Step 2: Convert to fraction form
    229.08/343.80 = 138/x
  3. Step 3: Cross multiply
    229.08x = 343.80 × 138
  4. Step 4: Simplify right side
    229.08x = 47,444.40
  5. Step 5: Solve for x
    x = 47,444.40/229.08
  6. Step 6: Final answer
    x = 207.11

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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.