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Finding the Fourth Proportional to 349.60, 481.75 and 345.28

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Solution

The fourth proportional to 349.60, 481.75 and 345.28 is: 475.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    349.60 : 481.75 = 345.28 : x
  2. Step 2: Convert to fraction form
    349.60/481.75 = 345.28/x
  3. Step 3: Cross multiply
    349.60x = 481.75 × 345.28
  4. Step 4: Simplify right side
    349.60x = 166,337.48
  5. Step 5: Solve for x
    x = 166,337.48/349.60
  6. Step 6: Final answer
    x = 475.79

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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.