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Finding the Fourth Proportional to 228, 341.68 and 136.72

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Solution

The fourth proportional to 228, 341.68 and 136.72 is: 204.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    228 : 341.68 = 136.72 : x
  2. Step 2: Convert to fraction form
    228/341.68 = 136.72/x
  3. Step 3: Cross multiply
    228x = 341.68 × 136.72
  4. Step 4: Simplify right side
    228x = 46,714.49
  5. Step 5: Solve for x
    x = 46,714.49/228
  6. Step 6: Final answer
    x = 204.89

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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.