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Finding the Fourth Proportional to 5,287.59, 7,928.97 and 1,998.36

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Solution

The fourth proportional to 5,287.59, 7,928.97 and 1,998.36 is: 2,996.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,287.59 : 7,928.97 = 1,998.36 : x
  2. Step 2: Convert to fraction form
    5,287.59/7,928.97 = 1,998.36/x
  3. Step 3: Cross multiply
    5,287.59x = 7,928.97 × 1,998.36
  4. Step 4: Simplify right side
    5,287.59x = 15,844,936.49
  5. Step 5: Solve for x
    x = 15,844,936.49/5,287.59
  6. Step 6: Final answer
    x = 2,996.63

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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.