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Finding the Fourth Proportional to 318.18, 476.82 and 279.48

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Solution

The fourth proportional to 318.18, 476.82 and 279.48 is: 418.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    318.18 : 476.82 = 279.48 : x
  2. Step 2: Convert to fraction form
    318.18/476.82 = 279.48/x
  3. Step 3: Cross multiply
    318.18x = 476.82 × 279.48
  4. Step 4: Simplify right side
    318.18x = 133,261.65
  5. Step 5: Solve for x
    x = 133,261.65/318.18
  6. Step 6: Final answer
    x = 418.82

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.