Home / 5,227.20-7,840.81-1,331.60

Finding the Fourth Proportional to 5,227.20, 7,840.81 and 1,331.60

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Solution

The fourth proportional to 5,227.20, 7,840.81 and 1,331.60 is: 1,997.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,227.20 : 7,840.81 = 1,331.60 : x
  2. Step 2: Convert to fraction form
    5,227.20/7,840.81 = 1,331.60/x
  3. Step 3: Cross multiply
    5,227.20x = 7,840.81 × 1,331.60
  4. Step 4: Simplify right side
    5,227.20x = 10,440,842.06
  5. Step 5: Solve for x
    x = 10,440,842.06/5,227.20
  6. Step 6: Final answer
    x = 1,997.41

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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.