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Finding the Fourth Proportional to 682.56, 940.43 and 493.36

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Solution

The fourth proportional to 682.56, 940.43 and 493.36 is: 679.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    682.56 : 940.43 = 493.36 : x
  2. Step 2: Convert to fraction form
    682.56/940.43 = 493.36/x
  3. Step 3: Cross multiply
    682.56x = 940.43 × 493.36
  4. Step 4: Simplify right side
    682.56x = 463,970.54
  5. Step 5: Solve for x
    x = 463,970.54/682.56
  6. Step 6: Final answer
    x = 679.75

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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.