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Finding the Fourth Proportional to 1,181.79, 1,773.36 and 451.31

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Solution

The fourth proportional to 1,181.79, 1,773.36 and 451.31 is: 677.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,181.79 : 1,773.36 = 451.31 : x
  2. Step 2: Convert to fraction form
    1,181.79/1,773.36 = 451.31/x
  3. Step 3: Cross multiply
    1,181.79x = 1,773.36 × 451.31
  4. Step 4: Simplify right side
    1,181.79x = 800,326.23
  5. Step 5: Solve for x
    x = 800,326.23/1,181.79
  6. Step 6: Final answer
    x = 677.22

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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.