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Finding the Fourth Proportional to 493.18, 680.64 and 283.38

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Solution

The fourth proportional to 493.18, 680.64 and 283.38 is: 391.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    493.18 : 680.64 = 283.38 : x
  2. Step 2: Convert to fraction form
    493.18/680.64 = 283.38/x
  3. Step 3: Cross multiply
    493.18x = 680.64 × 283.38
  4. Step 4: Simplify right side
    493.18x = 192,879.76
  5. Step 5: Solve for x
    x = 192,879.76/493.18
  6. Step 6: Final answer
    x = 391.09

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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.