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Finding the Fourth Proportional to 299.11, 411.88 and 284.53

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Solution

The fourth proportional to 299.11, 411.88 and 284.53 is: 391.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    299.11 : 411.88 = 284.53 : x
  2. Step 2: Convert to fraction form
    299.11/411.88 = 284.53/x
  3. Step 3: Cross multiply
    299.11x = 411.88 × 284.53
  4. Step 4: Simplify right side
    299.11x = 117,192.22
  5. Step 5: Solve for x
    x = 117,192.22/299.11
  6. Step 6: Final answer
    x = 391.80

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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.