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Finding the Fourth Proportional to 316.44, 436.30 and 205.87

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Solution

The fourth proportional to 316.44, 436.30 and 205.87 is: 283.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    316.44 : 436.30 = 205.87 : x
  2. Step 2: Convert to fraction form
    316.44/436.30 = 205.87/x
  3. Step 3: Cross multiply
    316.44x = 436.30 × 205.87
  4. Step 4: Simplify right side
    316.44x = 89,821.08
  5. Step 5: Solve for x
    x = 89,821.08/316.44
  6. Step 6: Final answer
    x = 283.85

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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.