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Finding the Fourth Proportional to 318.82, 440.08 and 245.04

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Solution

The fourth proportional to 318.82, 440.08 and 245.04 is: 338.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    318.82 : 440.08 = 245.04 : x
  2. Step 2: Convert to fraction form
    318.82/440.08 = 245.04/x
  3. Step 3: Cross multiply
    318.82x = 440.08 × 245.04
  4. Step 4: Simplify right side
    318.82x = 107,837.20
  5. Step 5: Solve for x
    x = 107,837.20/318.82
  6. Step 6: Final answer
    x = 338.24

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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.