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Finding the Fourth Proportional to 300.64, 415.28 and 293.44

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Solution

The fourth proportional to 300.64, 415.28 and 293.44 is: 405.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    300.64 : 415.28 = 293.44 : x
  2. Step 2: Convert to fraction form
    300.64/415.28 = 293.44/x
  3. Step 3: Cross multiply
    300.64x = 415.28 × 293.44
  4. Step 4: Simplify right side
    300.64x = 121,859.76
  5. Step 5: Solve for x
    x = 121,859.76/300.64
  6. Step 6: Final answer
    x = 405.33

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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.