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Finding the Fourth Proportional to 3,980.96, 5,496.46 and 2,489.60

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Solution

The fourth proportional to 3,980.96, 5,496.46 and 2,489.60 is: 3,437.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,980.96 : 5,496.46 = 2,489.60 : x
  2. Step 2: Convert to fraction form
    3,980.96/5,496.46 = 2,489.60/x
  3. Step 3: Cross multiply
    3,980.96x = 5,496.46 × 2,489.60
  4. Step 4: Simplify right side
    3,980.96x = 13,683,986.82
  5. Step 5: Solve for x
    x = 13,683,986.82/3,980.96
  6. Step 6: Final answer
    x = 3,437.36

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.