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Finding the Fourth Proportional to 318.12, 437.97 and 299.89

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Solution

The fourth proportional to 318.12, 437.97 and 299.89 is: 412.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    318.12 : 437.97 = 299.89 : x
  2. Step 2: Convert to fraction form
    318.12/437.97 = 299.89/x
  3. Step 3: Cross multiply
    318.12x = 437.97 × 299.89
  4. Step 4: Simplify right side
    318.12x = 131,342.82
  5. Step 5: Solve for x
    x = 131,342.82/318.12
  6. Step 6: Final answer
    x = 412.87

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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.