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Finding the Fourth Proportional to 1,181.77, 1,772.64 and 412.25

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Solution

The fourth proportional to 1,181.77, 1,772.64 and 412.25 is: 618.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,181.77 : 1,772.64 = 412.25 : x
  2. Step 2: Convert to fraction form
    1,181.77/1,772.64 = 412.25/x
  3. Step 3: Cross multiply
    1,181.77x = 1,772.64 × 412.25
  4. Step 4: Simplify right side
    1,181.77x = 730,768.78
  5. Step 5: Solve for x
    x = 730,768.78/1,181.77
  6. Step 6: Final answer
    x = 618.37

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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.