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Finding the Fourth Proportional to 349, 481.70 and 211.08

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Solution

The fourth proportional to 349, 481.70 and 211.08 is: 291.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    349 : 481.70 = 211.08 : x
  2. Step 2: Convert to fraction form
    349/481.70 = 211.08/x
  3. Step 3: Cross multiply
    349x = 481.70 × 211.08
  4. Step 4: Simplify right side
    349x = 101,677.24
  5. Step 5: Solve for x
    x = 101,677.24/349
  6. Step 6: Final answer
    x = 291.34

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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.