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Finding the Fourth Proportional to 349.91, 482.20 and 251.49

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Solution

The fourth proportional to 349.91, 482.20 and 251.49 is: 346.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    349.91 : 482.20 = 251.49 : x
  2. Step 2: Convert to fraction form
    349.91/482.20 = 251.49/x
  3. Step 3: Cross multiply
    349.91x = 482.20 × 251.49
  4. Step 4: Simplify right side
    349.91x = 121,268.48
  5. Step 5: Solve for x
    x = 121,268.48/349.91
  6. Step 6: Final answer
    x = 346.57

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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.