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Finding the Fourth Proportional to 493.03, 680.36 and 318.37

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Solution

The fourth proportional to 493.03, 680.36 and 318.37 is: 439.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    493.03 : 680.36 = 318.37 : x
  2. Step 2: Convert to fraction form
    493.03/680.36 = 318.37/x
  3. Step 3: Cross multiply
    493.03x = 680.36 × 318.37
  4. Step 4: Simplify right side
    493.03x = 216,606.21
  5. Step 5: Solve for x
    x = 216,606.21/493.03
  6. Step 6: Final answer
    x = 439.34

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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.