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Finding the Fourth Proportional to 1,181.31, 1,629.30 and 866.46

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Solution

The fourth proportional to 1,181.31, 1,629.30 and 866.46 is: 1,195.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,181.31 : 1,629.30 = 866.46 : x
  2. Step 2: Convert to fraction form
    1,181.31/1,629.30 = 866.46/x
  3. Step 3: Cross multiply
    1,181.31x = 1,629.30 × 866.46
  4. Step 4: Simplify right side
    1,181.31x = 1,411,723.28
  5. Step 5: Solve for x
    x = 1,411,723.28/1,181.31
  6. Step 6: Final answer
    x = 1,195.05

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.