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Finding the Fourth Proportional to 297.64, 445.69 and 254.58

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Solution

The fourth proportional to 297.64, 445.69 and 254.58 is: 381.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    297.64 : 445.69 = 254.58 : x
  2. Step 2: Convert to fraction form
    297.64/445.69 = 254.58/x
  3. Step 3: Cross multiply
    297.64x = 445.69 × 254.58
  4. Step 4: Simplify right side
    297.64x = 113,463.12
  5. Step 5: Solve for x
    x = 113,463.12/297.64
  6. Step 6: Final answer
    x = 381.21

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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.