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Finding the Fourth Proportional to 347.56, 478.86 and 236.80

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Solution

The fourth proportional to 347.56, 478.86 and 236.80 is: 326.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    347.56 : 478.86 = 236.80 : x
  2. Step 2: Convert to fraction form
    347.56/478.86 = 236.80/x
  3. Step 3: Cross multiply
    347.56x = 478.86 × 236.80
  4. Step 4: Simplify right side
    347.56x = 113,394.05
  5. Step 5: Solve for x
    x = 113,394.05/347.56
  6. Step 6: Final answer
    x = 326.26

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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.