Home / 1,921.56-2,651.62-1,135.45

Finding the Fourth Proportional to 1,921.56, 2,651.62 and 1,135.45

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Solution

The fourth proportional to 1,921.56, 2,651.62 and 1,135.45 is: 1,566.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,921.56 : 2,651.62 = 1,135.45 : x
  2. Step 2: Convert to fraction form
    1,921.56/2,651.62 = 1,135.45/x
  3. Step 3: Cross multiply
    1,921.56x = 2,651.62 × 1,135.45
  4. Step 4: Simplify right side
    1,921.56x = 3,010,785.25
  5. Step 5: Solve for x
    x = 3,010,785.25/1,921.56
  6. Step 6: Final answer
    x = 1,566.85

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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.