Home / 2,681.72-4,020.66-1,220.12

Finding the Fourth Proportional to 2,681.72, 4,020.66 and 1,220.12

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Solution

The fourth proportional to 2,681.72, 4,020.66 and 1,220.12 is: 1,829.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,681.72 : 4,020.66 = 1,220.12 : x
  2. Step 2: Convert to fraction form
    2,681.72/4,020.66 = 1,220.12/x
  3. Step 3: Cross multiply
    2,681.72x = 4,020.66 × 1,220.12
  4. Step 4: Simplify right side
    2,681.72x = 4,905,687.68
  5. Step 5: Solve for x
    x = 4,905,687.68/2,681.72
  6. Step 6: Final answer
    x = 1,829.31

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1.5x scale

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.