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Finding the Fourth Proportional to 3,259.54, 4,889.60 and 919.56

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Solution

The fourth proportional to 3,259.54, 4,889.60 and 919.56 is: 1,379.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,259.54 : 4,889.60 = 919.56 : x
  2. Step 2: Convert to fraction form
    3,259.54/4,889.60 = 919.56/x
  3. Step 3: Cross multiply
    3,259.54x = 4,889.60 × 919.56
  4. Step 4: Simplify right side
    3,259.54x = 4,496,297.76
  5. Step 5: Solve for x
    x = 4,496,297.76/3,259.54
  6. Step 6: Final answer
    x = 1,379.43

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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.