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Finding the Fourth Proportional to 299.71, 449.34 and 256.60

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Solution

The fourth proportional to 299.71, 449.34 and 256.60 is: 384.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    299.71 : 449.34 = 256.60 : x
  2. Step 2: Convert to fraction form
    299.71/449.34 = 256.60/x
  3. Step 3: Cross multiply
    299.71x = 449.34 × 256.60
  4. Step 4: Simplify right side
    299.71x = 115,300.64
  5. Step 5: Solve for x
    x = 115,300.64/299.71
  6. Step 6: Final answer
    x = 384.71

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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.