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Finding the Fourth Proportional to 681.86, 941.35 and 449.39

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Solution

The fourth proportional to 681.86, 941.35 and 449.39 is: 620.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    681.86 : 941.35 = 449.39 : x
  2. Step 2: Convert to fraction form
    681.86/941.35 = 449.39/x
  3. Step 3: Cross multiply
    681.86x = 941.35 × 449.39
  4. Step 4: Simplify right side
    681.86x = 423,027.45
  5. Step 5: Solve for x
    x = 423,027.45/681.86
  6. Step 6: Final answer
    x = 620.41

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Double scale
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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.