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Finding the Fourth Proportional to 3,889.20, 5,848.20 and 3,255.60

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Solution

The fourth proportional to 3,889.20, 5,848.20 and 3,255.60 is: 4,895.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,889.20 : 5,848.20 = 3,255.60 : x
  2. Step 2: Convert to fraction form
    3,889.20/5,848.20 = 3,255.60/x
  3. Step 3: Cross multiply
    3,889.20x = 5,848.20 × 3,255.60
  4. Step 4: Simplify right side
    3,889.20x = 19,039,399.92
  5. Step 5: Solve for x
    x = 19,039,399.92/3,889.20
  6. Step 6: Final answer
    x = 4,895.45

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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.