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Finding the Fourth Proportional to 1,181.94, 1,631.10 and 657.96

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Solution

The fourth proportional to 1,181.94, 1,631.10 and 657.96 is: 908.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,181.94 : 1,631.10 = 657.96 : x
  2. Step 2: Convert to fraction form
    1,181.94/1,631.10 = 657.96/x
  3. Step 3: Cross multiply
    1,181.94x = 1,631.10 × 657.96
  4. Step 4: Simplify right side
    1,181.94x = 1,073,198.56
  5. Step 5: Solve for x
    x = 1,073,198.56/1,181.94
  6. Step 6: Final answer
    x = 908.00

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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.