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Finding the Fourth Proportional to 316.42, 436.37 and 211.46

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Solution

The fourth proportional to 316.42, 436.37 and 211.46 is: 291.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    316.42 : 436.37 = 211.46 : x
  2. Step 2: Convert to fraction form
    316.42/436.37 = 211.46/x
  3. Step 3: Cross multiply
    316.42x = 436.37 × 211.46
  4. Step 4: Simplify right side
    316.42x = 92,271.56
  5. Step 5: Solve for x
    x = 92,271.56/316.42
  6. Step 6: Final answer
    x = 291.61

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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.