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Finding the Fourth Proportional to 262.69, 394.04 and 139.35

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Solution

The fourth proportional to 262.69, 394.04 and 139.35 is: 209.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    262.69 : 394.04 = 139.35 : x
  2. Step 2: Convert to fraction form
    262.69/394.04 = 139.35/x
  3. Step 3: Cross multiply
    262.69x = 394.04 × 139.35
  4. Step 4: Simplify right side
    262.69x = 54,907.58
  5. Step 5: Solve for x
    x = 54,907.58/262.69
  6. Step 6: Final answer
    x = 209.02

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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.