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Finding the Fourth Proportional to 349.46, 481.28 and 305.18

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Solution

The fourth proportional to 349.46, 481.28 and 305.18 is: 420.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    349.46 : 481.28 = 305.18 : x
  2. Step 2: Convert to fraction form
    349.46/481.28 = 305.18/x
  3. Step 3: Cross multiply
    349.46x = 481.28 × 305.18
  4. Step 4: Simplify right side
    349.46x = 146,876.71
  5. Step 5: Solve for x
    x = 146,876.71/349.46
  6. Step 6: Final answer
    x = 420.29

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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.