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Finding the Fourth Proportional to 1,180.43, 1,628.70 and 682.97

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Solution

The fourth proportional to 1,180.43, 1,628.70 and 682.97 is: 942.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,180.43 : 1,628.70 = 682.97 : x
  2. Step 2: Convert to fraction form
    1,180.43/1,628.70 = 682.97/x
  3. Step 3: Cross multiply
    1,180.43x = 1,628.70 × 682.97
  4. Step 4: Simplify right side
    1,180.43x = 1,112,345.10
  5. Step 5: Solve for x
    x = 1,112,345.10/1,180.43
  6. Step 6: Final answer
    x = 942.33

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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.