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Finding the Fourth Proportional to 349.55, 485.61 and 346.38

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Solution

The fourth proportional to 349.55, 485.61 and 346.38 is: 481.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    349.55 : 485.61 = 346.38 : x
  2. Step 2: Convert to fraction form
    349.55/485.61 = 346.38/x
  3. Step 3: Cross multiply
    349.55x = 485.61 × 346.38
  4. Step 4: Simplify right side
    349.55x = 168,203.16
  5. Step 5: Solve for x
    x = 168,203.16/349.55
  6. Step 6: Final answer
    x = 481.21

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Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.