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Finding the Fourth Proportional to 493.34, 680.72 and 306.77

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Solution

The fourth proportional to 493.34, 680.72 and 306.77 is: 423.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    493.34 : 680.72 = 306.77 : x
  2. Step 2: Convert to fraction form
    493.34/680.72 = 306.77/x
  3. Step 3: Cross multiply
    493.34x = 680.72 × 306.77
  4. Step 4: Simplify right side
    493.34x = 208,819.54
  5. Step 5: Solve for x
    x = 208,819.54/493.34
  6. Step 6: Final answer
    x = 423.28

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1.5x scale

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.