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Finding the Fourth Proportional to 347.12, 479.11 and 236.64

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Solution

The fourth proportional to 347.12, 479.11 and 236.64 is: 326.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    347.12 : 479.11 = 236.64 : x
  2. Step 2: Convert to fraction form
    347.12/479.11 = 236.64/x
  3. Step 3: Cross multiply
    347.12x = 479.11 × 236.64
  4. Step 4: Simplify right side
    347.12x = 113,376.59
  5. Step 5: Solve for x
    x = 113,376.59/347.12
  6. Step 6: Final answer
    x = 326.62

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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.