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Finding the Fourth Proportional to 550.66, 825.99 and 139.83

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Solution

The fourth proportional to 550.66, 825.99 and 139.83 is: 209.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    550.66 : 825.99 = 139.83 : x
  2. Step 2: Convert to fraction form
    550.66/825.99 = 139.83/x
  3. Step 3: Cross multiply
    550.66x = 825.99 × 139.83
  4. Step 4: Simplify right side
    550.66x = 115,498.18
  5. Step 5: Solve for x
    x = 115,498.18/550.66
  6. Step 6: Final answer
    x = 209.75

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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.