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Finding the Fourth Proportional to 190.75, 285.99 and 69.00

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Solution

The fourth proportional to 190.75, 285.99 and 69.00 is: 103.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    190.75 : 285.99 = 69.00 : x
  2. Step 2: Convert to fraction form
    190.75/285.99 = 69.00/x
  3. Step 3: Cross multiply
    190.75x = 285.99 × 69.00
  4. Step 4: Simplify right side
    190.75x = 19,732.05
  5. Step 5: Solve for x
    x = 19,732.05/190.75
  6. Step 6: Final answer
    x = 103.45

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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.