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Finding the Fourth Proportional to 262.66, 393.86 and 154.48

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Solution

The fourth proportional to 262.66, 393.86 and 154.48 is: 231.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    262.66 : 393.86 = 154.48 : x
  2. Step 2: Convert to fraction form
    262.66/393.86 = 154.48/x
  3. Step 3: Cross multiply
    262.66x = 393.86 × 154.48
  4. Step 4: Simplify right side
    262.66x = 60,843.49
  5. Step 5: Solve for x
    x = 60,843.49/262.66
  6. Step 6: Final answer
    x = 231.64

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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.