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Finding the Fourth Proportional to 357.31, 492.59 and 349.55

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Solution

The fourth proportional to 357.31, 492.59 and 349.55 is: 481.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    357.31 : 492.59 = 349.55 : x
  2. Step 2: Convert to fraction form
    357.31/492.59 = 349.55/x
  3. Step 3: Cross multiply
    357.31x = 492.59 × 349.55
  4. Step 4: Simplify right side
    357.31x = 172,183.25
  5. Step 5: Solve for x
    x = 172,183.25/357.31
  6. Step 6: Final answer
    x = 481.89

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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.