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Finding the Fourth Proportional to 262.61, 393.77 and 108.49

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Solution

The fourth proportional to 262.61, 393.77 and 108.49 is: 162.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    262.61 : 393.77 = 108.49 : x
  2. Step 2: Convert to fraction form
    262.61/393.77 = 108.49/x
  3. Step 3: Cross multiply
    262.61x = 393.77 × 108.49
  4. Step 4: Simplify right side
    262.61x = 42,720.11
  5. Step 5: Solve for x
    x = 42,720.11/262.61
  6. Step 6: Final answer
    x = 162.68

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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.