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Finding the Fourth Proportional to 316.46, 437.13 and 243.68

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Solution

The fourth proportional to 316.46, 437.13 and 243.68 is: 336.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    316.46 : 437.13 = 243.68 : x
  2. Step 2: Convert to fraction form
    316.46/437.13 = 243.68/x
  3. Step 3: Cross multiply
    316.46x = 437.13 × 243.68
  4. Step 4: Simplify right side
    316.46x = 106,517.65
  5. Step 5: Solve for x
    x = 106,517.65/316.46
  6. Step 6: Final answer
    x = 336.59

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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.