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Finding the Fourth Proportional to 347.97, 479.34 and 347.16

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Solution

The fourth proportional to 347.97, 479.34 and 347.16 is: 478.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    347.97 : 479.34 = 347.16 : x
  2. Step 2: Convert to fraction form
    347.97/479.34 = 347.16/x
  3. Step 3: Cross multiply
    347.97x = 479.34 × 347.16
  4. Step 4: Simplify right side
    347.97x = 166,407.67
  5. Step 5: Solve for x
    x = 166,407.67/347.97
  6. Step 6: Final answer
    x = 478.22

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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.