Home / 1,921.08-2,882.69-1,781.66

Finding the Fourth Proportional to 1,921.08, 2,882.69 and 1,781.66

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Solution

The fourth proportional to 1,921.08, 2,882.69 and 1,781.66 is: 2,673.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,921.08 : 2,882.69 = 1,781.66 : x
  2. Step 2: Convert to fraction form
    1,921.08/2,882.69 = 1,781.66/x
  3. Step 3: Cross multiply
    1,921.08x = 2,882.69 × 1,781.66
  4. Step 4: Simplify right side
    1,921.08x = 5,135,978.45
  5. Step 5: Solve for x
    x = 5,135,978.45/1,921.08
  6. Step 6: Final answer
    x = 2,673.48

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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.