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Finding the Fourth Proportional to 682.14, 940.77 and 449.22

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Solution

The fourth proportional to 682.14, 940.77 and 449.22 is: 619.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    682.14 : 940.77 = 449.22 : x
  2. Step 2: Convert to fraction form
    682.14/940.77 = 449.22/x
  3. Step 3: Cross multiply
    682.14x = 940.77 × 449.22
  4. Step 4: Simplify right side
    682.14x = 422,612.70
  5. Step 5: Solve for x
    x = 422,612.70/682.14
  6. Step 6: Final answer
    x = 619.54

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1.5x scale

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.