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Finding the Fourth Proportional to 299.79, 450.24 and 286.29

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Solution

The fourth proportional to 299.79, 450.24 and 286.29 is: 429.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    299.79 : 450.24 = 286.29 : x
  2. Step 2: Convert to fraction form
    299.79/450.24 = 286.29/x
  3. Step 3: Cross multiply
    299.79x = 450.24 × 286.29
  4. Step 4: Simplify right side
    299.79x = 128,899.21
  5. Step 5: Solve for x
    x = 128,899.21/299.79
  6. Step 6: Final answer
    x = 429.97

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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.