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Finding the Fourth Proportional to 811.02, 1,216.51 and 550.37

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Solution

The fourth proportional to 811.02, 1,216.51 and 550.37 is: 825.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    811.02 : 1,216.51 = 550.37 : x
  2. Step 2: Convert to fraction form
    811.02/1,216.51 = 550.37/x
  3. Step 3: Cross multiply
    811.02x = 1,216.51 × 550.37
  4. Step 4: Simplify right side
    811.02x = 669,523.15
  5. Step 5: Solve for x
    x = 669,523.15/811.02
  6. Step 6: Final answer
    x = 825.54

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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.