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Finding the Fourth Proportional to 3,980.96, 5,975.46 and 1,642.36

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Solution

The fourth proportional to 3,980.96, 5,975.46 and 1,642.36 is: 2,465.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,980.96 : 5,975.46 = 1,642.36 : x
  2. Step 2: Convert to fraction form
    3,980.96/5,975.46 = 1,642.36/x
  3. Step 3: Cross multiply
    3,980.96x = 5,975.46 × 1,642.36
  4. Step 4: Simplify right side
    3,980.96x = 9,813,826.61
  5. Step 5: Solve for x
    x = 9,813,826.61/3,980.96
  6. Step 6: Final answer
    x = 2,465.19

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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.