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Finding the Fourth Proportional to 262.49, 393.58 and 108.49

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Solution

The fourth proportional to 262.49, 393.58 and 108.49 is: 162.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    262.49 : 393.58 = 108.49 : x
  2. Step 2: Convert to fraction form
    262.49/393.58 = 108.49/x
  3. Step 3: Cross multiply
    262.49x = 393.58 × 108.49
  4. Step 4: Simplify right side
    262.49x = 42,696.98
  5. Step 5: Solve for x
    x = 42,696.98/262.49
  6. Step 6: Final answer
    x = 162.66

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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.