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Finding the Fourth Proportional to 347.49, 479.32 and 223.31

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Solution

The fourth proportional to 347.49, 479.32 and 223.31 is: 308.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    347.49 : 479.32 = 223.31 : x
  2. Step 2: Convert to fraction form
    347.49/479.32 = 223.31/x
  3. Step 3: Cross multiply
    347.49x = 479.32 × 223.31
  4. Step 4: Simplify right side
    347.49x = 107,033.44
  5. Step 5: Solve for x
    x = 107,033.44/347.49
  6. Step 6: Final answer
    x = 308.02

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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.