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Finding the Fourth Proportional to 1,448.40, 2,172.96 and 798.78

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Solution

The fourth proportional to 1,448.40, 2,172.96 and 798.78 is: 1,198.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,448.40 : 2,172.96 = 798.78 : x
  2. Step 2: Convert to fraction form
    1,448.40/2,172.96 = 798.78/x
  3. Step 3: Cross multiply
    1,448.40x = 2,172.96 × 798.78
  4. Step 4: Simplify right side
    1,448.40x = 1,735,716.99
  5. Step 5: Solve for x
    x = 1,735,716.99/1,448.40
  6. Step 6: Final answer
    x = 1,198.37

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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.