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Finding the Fourth Proportional to 1,181.25, 1,772.42 and 450.77

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Solution

The fourth proportional to 1,181.25, 1,772.42 and 450.77 is: 676.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,181.25 : 1,772.42 = 450.77 : x
  2. Step 2: Convert to fraction form
    1,181.25/1,772.42 = 450.77/x
  3. Step 3: Cross multiply
    1,181.25x = 1,772.42 × 450.77
  4. Step 4: Simplify right side
    1,181.25x = 798,942.65
  5. Step 5: Solve for x
    x = 798,942.65/1,181.25
  6. Step 6: Final answer
    x = 676.35

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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.