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Finding the Fourth Proportional to 351.14, 484.58 and 211.28

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Solution

The fourth proportional to 351.14, 484.58 and 211.28 is: 291.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    351.14 : 484.58 = 211.28 : x
  2. Step 2: Convert to fraction form
    351.14/484.58 = 211.28/x
  3. Step 3: Cross multiply
    351.14x = 484.58 × 211.28
  4. Step 4: Simplify right side
    351.14x = 102,380.17
  5. Step 5: Solve for x
    x = 102,380.17/351.14
  6. Step 6: Final answer
    x = 291.57

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.