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Finding the Fourth Proportional to 316.56, 436.80 and 211.89

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Solution

The fourth proportional to 316.56, 436.80 and 211.89 is: 292.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    316.56 : 436.80 = 211.89 : x
  2. Step 2: Convert to fraction form
    316.56/436.80 = 211.89/x
  3. Step 3: Cross multiply
    316.56x = 436.80 × 211.89
  4. Step 4: Simplify right side
    316.56x = 92,553.55
  5. Step 5: Solve for x
    x = 92,553.55/316.56
  6. Step 6: Final answer
    x = 292.37

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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.