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Finding the Fourth Proportional to 299.00, 407.09 and 298.08

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Solution

The fourth proportional to 299.00, 407.09 and 298.08 is: 405.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    299.00 : 407.09 = 298.08 : x
  2. Step 2: Convert to fraction form
    299.00/407.09 = 298.08/x
  3. Step 3: Cross multiply
    299.00x = 407.09 × 298.08
  4. Step 4: Simplify right side
    299.00x = 121,344.43
  5. Step 5: Solve for x
    x = 121,344.43/299.00
  6. Step 6: Final answer
    x = 405.83

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Why These Related Problems?

These problems maintain the same ratio (1.36) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.