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Finding the Fourth Proportional to 493.35, 680.90 and 296.86

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Solution

The fourth proportional to 493.35, 680.90 and 296.86 is: 409.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    493.35 : 680.90 = 296.86 : x
  2. Step 2: Convert to fraction form
    493.35/680.90 = 296.86/x
  3. Step 3: Cross multiply
    493.35x = 680.90 × 296.86
  4. Step 4: Simplify right side
    493.35x = 202,129.90
  5. Step 5: Solve for x
    x = 202,129.90/493.35
  6. Step 6: Final answer
    x = 409.71

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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.