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Finding the Fourth Proportional to 1,181.32, 1,772.22 and 412.36

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Solution

The fourth proportional to 1,181.32, 1,772.22 and 412.36 is: 618.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,181.32 : 1,772.22 = 412.36 : x
  2. Step 2: Convert to fraction form
    1,181.32/1,772.22 = 412.36/x
  3. Step 3: Cross multiply
    1,181.32x = 1,772.22 × 412.36
  4. Step 4: Simplify right side
    1,181.32x = 730,792.64
  5. Step 5: Solve for x
    x = 730,792.64/1,181.32
  6. Step 6: Final answer
    x = 618.62

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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.