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Finding the Fourth Proportional to 347.63, 479.19 and 229.40

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Solution

The fourth proportional to 347.63, 479.19 and 229.40 is: 316.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    347.63 : 479.19 = 229.40 : x
  2. Step 2: Convert to fraction form
    347.63/479.19 = 229.40/x
  3. Step 3: Cross multiply
    347.63x = 479.19 × 229.40
  4. Step 4: Simplify right side
    347.63x = 109,923.79
  5. Step 5: Solve for x
    x = 109,923.79/347.63
  6. Step 6: Final answer
    x = 316.21

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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.