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Finding the Fourth Proportional to 347.21, 478.68 and 236.49

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Solution

The fourth proportional to 347.21, 478.68 and 236.49 is: 326.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    347.21 : 478.68 = 236.49 : x
  2. Step 2: Convert to fraction form
    347.21/478.68 = 236.49/x
  3. Step 3: Cross multiply
    347.21x = 478.68 × 236.49
  4. Step 4: Simplify right side
    347.21x = 113,203.03
  5. Step 5: Solve for x
    x = 113,203.03/347.21
  6. Step 6: Final answer
    x = 326.04

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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.