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Finding the Fourth Proportional to 725.08, 1,086.86 and 551.39

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Solution

The fourth proportional to 725.08, 1,086.86 and 551.39 is: 826.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    725.08 : 1,086.86 = 551.39 : x
  2. Step 2: Convert to fraction form
    725.08/1,086.86 = 551.39/x
  3. Step 3: Cross multiply
    725.08x = 1,086.86 × 551.39
  4. Step 4: Simplify right side
    725.08x = 599,279.68
  5. Step 5: Solve for x
    x = 599,279.68/725.08
  6. Step 6: Final answer
    x = 826.50

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Double scale
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.