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Finding the Fourth Proportional to 262.91, 394.13 and 100.55

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Solution

The fourth proportional to 262.91, 394.13 and 100.55 is: 150.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    262.91 : 394.13 = 100.55 : x
  2. Step 2: Convert to fraction form
    262.91/394.13 = 100.55/x
  3. Step 3: Cross multiply
    262.91x = 394.13 × 100.55
  4. Step 4: Simplify right side
    262.91x = 39,631.01
  5. Step 5: Solve for x
    x = 39,631.01/262.91
  6. Step 6: Final answer
    x = 150.74

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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.