Home / 1,921.26-2,647.83-1,396.38

Finding the Fourth Proportional to 1,921.26, 2,647.83 and 1,396.38

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Solution

The fourth proportional to 1,921.26, 2,647.83 and 1,396.38 is: 1,924.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,921.26 : 2,647.83 = 1,396.38 : x
  2. Step 2: Convert to fraction form
    1,921.26/2,647.83 = 1,396.38/x
  3. Step 3: Cross multiply
    1,921.26x = 2,647.83 × 1,396.38
  4. Step 4: Simplify right side
    1,921.26x = 3,697,376.86
  5. Step 5: Solve for x
    x = 3,697,376.86/1,921.26
  6. Step 6: Final answer
    x = 1,924.45

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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.