Home / 1,921.64-2,648.18-1,331.08

Finding the Fourth Proportional to 1,921.64, 2,648.18 and 1,331.08

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Solution

The fourth proportional to 1,921.64, 2,648.18 and 1,331.08 is: 1,834.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,921.64 : 2,648.18 = 1,331.08 : x
  2. Step 2: Convert to fraction form
    1,921.64/2,648.18 = 1,331.08/x
  3. Step 3: Cross multiply
    1,921.64x = 2,648.18 × 1,331.08
  4. Step 4: Simplify right side
    1,921.64x = 3,524,939.43
  5. Step 5: Solve for x
    x = 3,524,939.43/1,921.64
  6. Step 6: Final answer
    x = 1,834.34

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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.