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Finding the Fourth Proportional to 1,969.87, 2,955.49 and 1,639.26

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Solution

The fourth proportional to 1,969.87, 2,955.49 and 1,639.26 is: 2,459.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,969.87 : 2,955.49 = 1,639.26 : x
  2. Step 2: Convert to fraction form
    1,969.87/2,955.49 = 1,639.26/x
  3. Step 3: Cross multiply
    1,969.87x = 2,955.49 × 1,639.26
  4. Step 4: Simplify right side
    1,969.87x = 4,844,816.54
  5. Step 5: Solve for x
    x = 4,844,816.54/1,969.87
  6. Step 6: Final answer
    x = 2,459.46

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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.