Home / 1,921.09-2,648.40-1,449.08

Finding the Fourth Proportional to 1,921.09, 2,648.40 and 1,449.08

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Solution

The fourth proportional to 1,921.09, 2,648.40 and 1,449.08 is: 1,997.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,921.09 : 2,648.40 = 1,449.08 : x
  2. Step 2: Convert to fraction form
    1,921.09/2,648.40 = 1,449.08/x
  3. Step 3: Cross multiply
    1,921.09x = 2,648.40 × 1,449.08
  4. Step 4: Simplify right side
    1,921.09x = 3,837,743.47
  5. Step 5: Solve for x
    x = 3,837,743.47/1,921.09
  6. Step 6: Final answer
    x = 1,997.69

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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.