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Finding the Fourth Proportional to 493.21, 680.66 and 283.35

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Solution

The fourth proportional to 493.21, 680.66 and 283.35 is: 391.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    493.21 : 680.66 = 283.35 : x
  2. Step 2: Convert to fraction form
    493.21/680.66 = 283.35/x
  3. Step 3: Cross multiply
    493.21x = 680.66 × 283.35
  4. Step 4: Simplify right side
    493.21x = 192,865.01
  5. Step 5: Solve for x
    x = 192,865.01/493.21
  6. Step 6: Final answer
    x = 391.04

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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.