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Finding the Fourth Proportional to 347.30, 479.28 and 216.38

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Solution

The fourth proportional to 347.30, 479.28 and 216.38 is: 298.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    347.30 : 479.28 = 216.38 : x
  2. Step 2: Convert to fraction form
    347.30/479.28 = 216.38/x
  3. Step 3: Cross multiply
    347.30x = 479.28 × 216.38
  4. Step 4: Simplify right side
    347.30x = 103,706.61
  5. Step 5: Solve for x
    x = 103,706.61/347.30
  6. Step 6: Final answer
    x = 298.61

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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.