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Finding the Fourth Proportional to 262.74, 393.87 and 190.74

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Solution

The fourth proportional to 262.74, 393.87 and 190.74 is: 285.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    262.74 : 393.87 = 190.74 : x
  2. Step 2: Convert to fraction form
    262.74/393.87 = 190.74/x
  3. Step 3: Cross multiply
    262.74x = 393.87 × 190.74
  4. Step 4: Simplify right side
    262.74x = 75,126.76
  5. Step 5: Solve for x
    x = 75,126.76/262.74
  6. Step 6: Final answer
    x = 285.94

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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.