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Finding the Fourth Proportional to 493.03, 680.20 and 316.02

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Solution

The fourth proportional to 493.03, 680.20 and 316.02 is: 435.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    493.03 : 680.20 = 316.02 : x
  2. Step 2: Convert to fraction form
    493.03/680.20 = 316.02/x
  3. Step 3: Cross multiply
    493.03x = 680.20 × 316.02
  4. Step 4: Simplify right side
    493.03x = 214,956.80
  5. Step 5: Solve for x
    x = 214,956.80/493.03
  6. Step 6: Final answer
    x = 435.99

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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.