Home / 2,005.73-2,768.01-1,121.54

Finding the Fourth Proportional to 2,005.73, 2,768.01 and 1,121.54

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Solution

The fourth proportional to 2,005.73, 2,768.01 and 1,121.54 is: 1,547.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,005.73 : 2,768.01 = 1,121.54 : x
  2. Step 2: Convert to fraction form
    2,005.73/2,768.01 = 1,121.54/x
  3. Step 3: Cross multiply
    2,005.73x = 2,768.01 × 1,121.54
  4. Step 4: Simplify right side
    2,005.73x = 3,104,433.94
  5. Step 5: Solve for x
    x = 3,104,433.94/2,005.73
  6. Step 6: Final answer
    x = 1,547.78

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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.