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Finding the Fourth Proportional to 299.64, 448.98 and 256.44

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Solution

The fourth proportional to 299.64, 448.98 and 256.44 is: 384.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    299.64 : 448.98 = 256.44 : x
  2. Step 2: Convert to fraction form
    299.64/448.98 = 256.44/x
  3. Step 3: Cross multiply
    299.64x = 448.98 × 256.44
  4. Step 4: Simplify right side
    299.64x = 115,136.43
  5. Step 5: Solve for x
    x = 115,136.43/299.64
  6. Step 6: Final answer
    x = 384.25

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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.