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Finding the Fourth Proportional to 4,891.56, 7,331.86 and 2,119.56

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Solution

The fourth proportional to 4,891.56, 7,331.86 and 2,119.56 is: 3,176.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,891.56 : 7,331.86 = 2,119.56 : x
  2. Step 2: Convert to fraction form
    4,891.56/7,331.86 = 2,119.56/x
  3. Step 3: Cross multiply
    4,891.56x = 7,331.86 × 2,119.56
  4. Step 4: Simplify right side
    4,891.56x = 15,540,317.18
  5. Step 5: Solve for x
    x = 15,540,317.18/4,891.56
  6. Step 6: Final answer
    x = 3,176.97

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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.