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Finding the Fourth Proportional to 316.45, 436.41 and 228.97

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Solution

The fourth proportional to 316.45, 436.41 and 228.97 is: 315.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    316.45 : 436.41 = 228.97 : x
  2. Step 2: Convert to fraction form
    316.45/436.41 = 228.97/x
  3. Step 3: Cross multiply
    316.45x = 436.41 × 228.97
  4. Step 4: Simplify right side
    316.45x = 99,924.80
  5. Step 5: Solve for x
    x = 99,924.80/316.45
  6. Step 6: Final answer
    x = 315.77

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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.