Home / 2,812.80-4,220.26-1,169.21

Finding the Fourth Proportional to 2,812.80, 4,220.26 and 1,169.21

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Solution

The fourth proportional to 2,812.80, 4,220.26 and 1,169.21 is: 1,754.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,812.80 : 4,220.26 = 1,169.21 : x
  2. Step 2: Convert to fraction form
    2,812.80/4,220.26 = 1,169.21/x
  3. Step 3: Cross multiply
    2,812.80x = 4,220.26 × 1,169.21
  4. Step 4: Simplify right side
    2,812.80x = 4,934,346.17
  5. Step 5: Solve for x
    x = 4,934,346.17/2,812.80
  6. Step 6: Final answer
    x = 1,754.25

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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.