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Finding the Fourth Proportional to 316.67, 436.95 and 211.91

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Solution

The fourth proportional to 316.67, 436.95 and 211.91 is: 292.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    316.67 : 436.95 = 211.91 : x
  2. Step 2: Convert to fraction form
    316.67/436.95 = 211.91/x
  3. Step 3: Cross multiply
    316.67x = 436.95 × 211.91
  4. Step 4: Simplify right side
    316.67x = 92,595.70
  5. Step 5: Solve for x
    x = 92,595.70/316.67
  6. Step 6: Final answer
    x = 292.40

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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.