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Finding the Fourth Proportional to 262.23, 393.36 and 208.18

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Solution

The fourth proportional to 262.23, 393.36 and 208.18 is: 312.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    262.23 : 393.36 = 208.18 : x
  2. Step 2: Convert to fraction form
    262.23/393.36 = 208.18/x
  3. Step 3: Cross multiply
    262.23x = 393.36 × 208.18
  4. Step 4: Simplify right side
    262.23x = 81,889.68
  5. Step 5: Solve for x
    x = 81,889.68/262.23
  6. Step 6: Final answer
    x = 312.28

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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.