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Finding the Fourth Proportional to 493.66, 680.94 and 316.66

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Solution

The fourth proportional to 493.66, 680.94 and 316.66 is: 436.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    493.66 : 680.94 = 316.66 : x
  2. Step 2: Convert to fraction form
    493.66/680.94 = 316.66/x
  3. Step 3: Cross multiply
    493.66x = 680.94 × 316.66
  4. Step 4: Simplify right side
    493.66x = 215,626.46
  5. Step 5: Solve for x
    x = 215,626.46/493.66
  6. Step 6: Final answer
    x = 436.79

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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.