Home / 1,378.48-2,067.68-1,172.56

Finding the Fourth Proportional to 1,378.48, 2,067.68 and 1,172.56

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Solution

The fourth proportional to 1,378.48, 2,067.68 and 1,172.56 is: 1,758.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,378.48 : 2,067.68 = 1,172.56 : x
  2. Step 2: Convert to fraction form
    1,378.48/2,067.68 = 1,172.56/x
  3. Step 3: Cross multiply
    1,378.48x = 2,067.68 × 1,172.56
  4. Step 4: Simplify right side
    1,378.48x = 2,424,478.86
  5. Step 5: Solve for x
    x = 2,424,478.86/1,378.48
  6. Step 6: Final answer
    x = 1,758.81

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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.