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Finding the Fourth Proportional to 318.22, 439.23 and 260.62

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Solution

The fourth proportional to 318.22, 439.23 and 260.62 is: 359.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    318.22 : 439.23 = 260.62 : x
  2. Step 2: Convert to fraction form
    318.22/439.23 = 260.62/x
  3. Step 3: Cross multiply
    318.22x = 439.23 × 260.62
  4. Step 4: Simplify right side
    318.22x = 114,472.12
  5. Step 5: Solve for x
    x = 114,472.12/318.22
  6. Step 6: Final answer
    x = 359.73

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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.