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Finding the Fourth Proportional to 228.93, 343.49 and 137.70

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Solution

The fourth proportional to 228.93, 343.49 and 137.70 is: 206.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    228.93 : 343.49 = 137.70 : x
  2. Step 2: Convert to fraction form
    228.93/343.49 = 137.70/x
  3. Step 3: Cross multiply
    228.93x = 343.49 × 137.70
  4. Step 4: Simplify right side
    228.93x = 47,296.17
  5. Step 5: Solve for x
    x = 47,296.17/228.93
  6. Step 6: Final answer
    x = 206.60

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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.