Home / 2,005.81-2,768.07-1,121.76

Finding the Fourth Proportional to 2,005.81, 2,768.07 and 1,121.76

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Solution

The fourth proportional to 2,005.81, 2,768.07 and 1,121.76 is: 1,548.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,005.81 : 2,768.07 = 1,121.76 : x
  2. Step 2: Convert to fraction form
    2,005.81/2,768.07 = 1,121.76/x
  3. Step 3: Cross multiply
    2,005.81x = 2,768.07 × 1,121.76
  4. Step 4: Simplify right side
    2,005.81x = 3,105,114.41
  5. Step 5: Solve for x
    x = 3,105,114.41/2,005.81
  6. Step 6: Final answer
    x = 1,548.06

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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.