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Finding the Fourth Proportional to 190.40, 262.46 and 143.93

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Solution

The fourth proportional to 190.40, 262.46 and 143.93 is: 198.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    190.40 : 262.46 = 143.93 : x
  2. Step 2: Convert to fraction form
    190.40/262.46 = 143.93/x
  3. Step 3: Cross multiply
    190.40x = 262.46 × 143.93
  4. Step 4: Simplify right side
    190.40x = 37,775.87
  5. Step 5: Solve for x
    x = 37,775.87/190.40
  6. Step 6: Final answer
    x = 198.40

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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.