Home / 2,820.33-4,230.50-1,280.25

Finding the Fourth Proportional to 2,820.33, 4,230.50 and 1,280.25

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Solution

The fourth proportional to 2,820.33, 4,230.50 and 1,280.25 is: 1,920.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,820.33 : 4,230.50 = 1,280.25 : x
  2. Step 2: Convert to fraction form
    2,820.33/4,230.50 = 1,280.25/x
  3. Step 3: Cross multiply
    2,820.33x = 4,230.50 × 1,280.25
  4. Step 4: Simplify right side
    2,820.33x = 5,416,091.22
  5. Step 5: Solve for x
    x = 5,416,091.22/2,820.33
  6. Step 6: Final answer
    x = 1,920.38

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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.