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Finding the Fourth Proportional to 315.98, 436.26 and 204.12

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Solution

The fourth proportional to 315.98, 436.26 and 204.12 is: 281.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    315.98 : 436.26 = 204.12 : x
  2. Step 2: Convert to fraction form
    315.98/436.26 = 204.12/x
  3. Step 3: Cross multiply
    315.98x = 436.26 × 204.12
  4. Step 4: Simplify right side
    315.98x = 89,049.58
  5. Step 5: Solve for x
    x = 89,049.58/315.98
  6. Step 6: Final answer
    x = 281.82

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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.