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Finding the Fourth Proportional to 262.53, 393.80 and 100.26

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Solution

The fourth proportional to 262.53, 393.80 and 100.26 is: 150.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    262.53 : 393.80 = 100.26 : x
  2. Step 2: Convert to fraction form
    262.53/393.80 = 100.26/x
  3. Step 3: Cross multiply
    262.53x = 393.80 × 100.26
  4. Step 4: Simplify right side
    262.53x = 39,481.89
  5. Step 5: Solve for x
    x = 39,481.89/262.53
  6. Step 6: Final answer
    x = 150.39

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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.