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Finding the Fourth Proportional to 230.38, 345.85 and 211.28

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Solution

The fourth proportional to 230.38, 345.85 and 211.28 is: 317.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    230.38 : 345.85 = 211.28 : x
  2. Step 2: Convert to fraction form
    230.38/345.85 = 211.28/x
  3. Step 3: Cross multiply
    230.38x = 345.85 × 211.28
  4. Step 4: Simplify right side
    230.38x = 73,068.93
  5. Step 5: Solve for x
    x = 73,068.93/230.38
  6. Step 6: Final answer
    x = 317.17

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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.