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Finding the Fourth Proportional to 347.79, 479.62 and 229.71

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Solution

The fourth proportional to 347.79, 479.62 and 229.71 is: 316.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    347.79 : 479.62 = 229.71 : x
  2. Step 2: Convert to fraction form
    347.79/479.62 = 229.71/x
  3. Step 3: Cross multiply
    347.79x = 479.62 × 229.71
  4. Step 4: Simplify right side
    347.79x = 110,175.60
  5. Step 5: Solve for x
    x = 110,175.60/347.79
  6. Step 6: Final answer
    x = 316.78

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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.