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Finding the Fourth Proportional to 347.49, 479.61 and 236.79

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Solution

The fourth proportional to 347.49, 479.61 and 236.79 is: 326.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    347.49 : 479.61 = 236.79 : x
  2. Step 2: Convert to fraction form
    347.49/479.61 = 236.79/x
  3. Step 3: Cross multiply
    347.49x = 479.61 × 236.79
  4. Step 4: Simplify right side
    347.49x = 113,566.85
  5. Step 5: Solve for x
    x = 113,566.85/347.49
  6. Step 6: Final answer
    x = 326.82

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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.