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Finding the Fourth Proportional to 493.32, 680.91 and 306.70

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Solution

The fourth proportional to 493.32, 680.91 and 306.70 is: 423.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    493.32 : 680.91 = 306.70 : x
  2. Step 2: Convert to fraction form
    493.32/680.91 = 306.70/x
  3. Step 3: Cross multiply
    493.32x = 680.91 × 306.70
  4. Step 4: Simplify right side
    493.32x = 208,835.10
  5. Step 5: Solve for x
    x = 208,835.10/493.32
  6. Step 6: Final answer
    x = 423.33

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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.