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Finding the Fourth Proportional to 300.97, 415.40 and 190.59

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Solution

The fourth proportional to 300.97, 415.40 and 190.59 is: 263.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    300.97 : 415.40 = 190.59 : x
  2. Step 2: Convert to fraction form
    300.97/415.40 = 190.59/x
  3. Step 3: Cross multiply
    300.97x = 415.40 × 190.59
  4. Step 4: Simplify right side
    300.97x = 79,170.13
  5. Step 5: Solve for x
    x = 79,170.13/300.97
  6. Step 6: Final answer
    x = 263.05

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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.