Home / 2,810.90-3,879.34-1,692.20

Finding the Fourth Proportional to 2,810.90, 3,879.34 and 1,692.20

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Solution

The fourth proportional to 2,810.90, 3,879.34 and 1,692.20 is: 2,335.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,810.90 : 3,879.34 = 1,692.20 : x
  2. Step 2: Convert to fraction form
    2,810.90/3,879.34 = 1,692.20/x
  3. Step 3: Cross multiply
    2,810.90x = 3,879.34 × 1,692.20
  4. Step 4: Simplify right side
    2,810.90x = 6,564,619.15
  5. Step 5: Solve for x
    x = 6,564,619.15/2,810.90
  6. Step 6: Final answer
    x = 2,335.42

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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.