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Finding the Fourth Proportional to 351.39, 484.77 and 211.51

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Solution

The fourth proportional to 351.39, 484.77 and 211.51 is: 291.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    351.39 : 484.77 = 211.51 : x
  2. Step 2: Convert to fraction form
    351.39/484.77 = 211.51/x
  3. Step 3: Cross multiply
    351.39x = 484.77 × 211.51
  4. Step 4: Simplify right side
    351.39x = 102,532.49
  5. Step 5: Solve for x
    x = 102,532.49/351.39
  6. Step 6: Final answer
    x = 291.79

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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.