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Finding the Fourth Proportional to 661.30, 911.73 and 550.33

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Solution

The fourth proportional to 661.30, 911.73 and 550.33 is: 758.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    661.30 : 911.73 = 550.33 : x
  2. Step 2: Convert to fraction form
    661.30/911.73 = 550.33/x
  3. Step 3: Cross multiply
    661.30x = 911.73 × 550.33
  4. Step 4: Simplify right side
    661.30x = 501,752.37
  5. Step 5: Solve for x
    x = 501,752.37/661.30
  6. Step 6: Final answer
    x = 758.74

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.