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Finding the Fourth Proportional to 347.88, 479.66 and 249.42

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Solution

The fourth proportional to 347.88, 479.66 and 249.42 is: 343.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    347.88 : 479.66 = 249.42 : x
  2. Step 2: Convert to fraction form
    347.88/479.66 = 249.42/x
  3. Step 3: Cross multiply
    347.88x = 479.66 × 249.42
  4. Step 4: Simplify right side
    347.88x = 119,636.80
  5. Step 5: Solve for x
    x = 119,636.80/347.88
  6. Step 6: Final answer
    x = 343.90

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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.