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Finding the Fourth Proportional to 347.12, 479.08 and 216.15

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Solution

The fourth proportional to 347.12, 479.08 and 216.15 is: 298.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    347.12 : 479.08 = 216.15 : x
  2. Step 2: Convert to fraction form
    347.12/479.08 = 216.15/x
  3. Step 3: Cross multiply
    347.12x = 479.08 × 216.15
  4. Step 4: Simplify right side
    347.12x = 103,553.14
  5. Step 5: Solve for x
    x = 103,553.14/347.12
  6. Step 6: Final answer
    x = 298.32

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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.