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Finding the Fourth Proportional to 190.51, 286.79 and 130.03

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Solution

The fourth proportional to 190.51, 286.79 and 130.03 is: 195.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    190.51 : 286.79 = 130.03 : x
  2. Step 2: Convert to fraction form
    190.51/286.79 = 130.03/x
  3. Step 3: Cross multiply
    190.51x = 286.79 × 130.03
  4. Step 4: Simplify right side
    190.51x = 37,290.91
  5. Step 5: Solve for x
    x = 37,290.91/190.51
  6. Step 6: Final answer
    x = 195.75

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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.