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Finding the Fourth Proportional to 262.10, 393.32 and 193.79

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Solution

The fourth proportional to 262.10, 393.32 and 193.79 is: 290.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    262.10 : 393.32 = 193.79 : x
  2. Step 2: Convert to fraction form
    262.10/393.32 = 193.79/x
  3. Step 3: Cross multiply
    262.10x = 393.32 × 193.79
  4. Step 4: Simplify right side
    262.10x = 76,222.95
  5. Step 5: Solve for x
    x = 76,222.95/262.10
  6. Step 6: Final answer
    x = 290.81

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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.