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Finding the Fourth Proportional to 190.94, 287.53 and 171.91

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Solution

The fourth proportional to 190.94, 287.53 and 171.91 is: 258.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    190.94 : 287.53 = 171.91 : x
  2. Step 2: Convert to fraction form
    190.94/287.53 = 171.91/x
  3. Step 3: Cross multiply
    190.94x = 287.53 × 171.91
  4. Step 4: Simplify right side
    190.94x = 49,426.99
  5. Step 5: Solve for x
    x = 49,426.99/190.94
  6. Step 6: Final answer
    x = 258.86

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.