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Finding the Fourth Proportional to 1,055.68, 1,456.48 and 682.75

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Solution

The fourth proportional to 1,055.68, 1,456.48 and 682.75 is: 941.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,055.68 : 1,456.48 = 682.75 : x
  2. Step 2: Convert to fraction form
    1,055.68/1,456.48 = 682.75/x
  3. Step 3: Cross multiply
    1,055.68x = 1,456.48 × 682.75
  4. Step 4: Simplify right side
    1,055.68x = 994,418.49
  5. Step 5: Solve for x
    x = 994,418.49/1,055.68
  6. Step 6: Final answer
    x = 941.97

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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.