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Finding the Fourth Proportional to 812.87, 1,218.32 and 466.44

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Solution

The fourth proportional to 812.87, 1,218.32 and 466.44 is: 699.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    812.87 : 1,218.32 = 466.44 : x
  2. Step 2: Convert to fraction form
    812.87/1,218.32 = 466.44/x
  3. Step 3: Cross multiply
    812.87x = 1,218.32 × 466.44
  4. Step 4: Simplify right side
    812.87x = 568,277.51
  5. Step 5: Solve for x
    x = 568,277.51/812.87
  6. Step 6: Final answer
    x = 699.10

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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.