Home / 2,681.30-4,021.22-1,220.12

Finding the Fourth Proportional to 2,681.30, 4,021.22 and 1,220.12

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Solution

The fourth proportional to 2,681.30, 4,021.22 and 1,220.12 is: 1,829.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,681.30 : 4,021.22 = 1,220.12 : x
  2. Step 2: Convert to fraction form
    2,681.30/4,021.22 = 1,220.12/x
  3. Step 3: Cross multiply
    2,681.30x = 4,021.22 × 1,220.12
  4. Step 4: Simplify right side
    2,681.30x = 4,906,344.74
  5. Step 5: Solve for x
    x = 4,906,344.74/2,681.30
  6. Step 6: Final answer
    x = 1,829.84

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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.