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Finding the Fourth Proportional to 316.49, 437.18 and 238.40

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Solution

The fourth proportional to 316.49, 437.18 and 238.40 is: 329.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    316.49 : 437.18 = 238.40 : x
  2. Step 2: Convert to fraction form
    316.49/437.18 = 238.40/x
  3. Step 3: Cross multiply
    316.49x = 437.18 × 238.40
  4. Step 4: Simplify right side
    316.49x = 104,221.68
  5. Step 5: Solve for x
    x = 104,221.68/316.49
  6. Step 6: Final answer
    x = 329.31

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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.