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Finding the Fourth Proportional to 612.21, 917.63 and 550.37

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Solution

The fourth proportional to 612.21, 917.63 and 550.37 is: 824.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    612.21 : 917.63 = 550.37 : x
  2. Step 2: Convert to fraction form
    612.21/917.63 = 550.37/x
  3. Step 3: Cross multiply
    612.21x = 917.63 × 550.37
  4. Step 4: Simplify right side
    612.21x = 505,028.68
  5. Step 5: Solve for x
    x = 505,028.68/612.21
  6. Step 6: Final answer
    x = 824.93

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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.