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Finding the Fourth Proportional to 351.48, 484.96 and 211.56

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Solution

The fourth proportional to 351.48, 484.96 and 211.56 is: 291.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    351.48 : 484.96 = 211.56 : x
  2. Step 2: Convert to fraction form
    351.48/484.96 = 211.56/x
  3. Step 3: Cross multiply
    351.48x = 484.96 × 211.56
  4. Step 4: Simplify right side
    351.48x = 102,598.14
  5. Step 5: Solve for x
    x = 102,598.14/351.48
  6. Step 6: Final answer
    x = 291.90

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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.