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Finding the Fourth Proportional to 351.17, 484.64 and 211.31

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Solution

The fourth proportional to 351.17, 484.64 and 211.31 is: 291.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    351.17 : 484.64 = 211.31 : x
  2. Step 2: Convert to fraction form
    351.17/484.64 = 211.31/x
  3. Step 3: Cross multiply
    351.17x = 484.64 × 211.31
  4. Step 4: Simplify right side
    351.17x = 102,405.80
  5. Step 5: Solve for x
    x = 102,405.80/351.17
  6. Step 6: Final answer
    x = 291.62

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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.