Home / 3,108.90-4,290.20-1,692.56

Finding the Fourth Proportional to 3,108.90, 4,290.20 and 1,692.56

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Solution

The fourth proportional to 3,108.90, 4,290.20 and 1,692.56 is: 2,335.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,108.90 : 4,290.20 = 1,692.56 : x
  2. Step 2: Convert to fraction form
    3,108.90/4,290.20 = 1,692.56/x
  3. Step 3: Cross multiply
    3,108.90x = 4,290.20 × 1,692.56
  4. Step 4: Simplify right side
    3,108.90x = 7,261,405.21
  5. Step 5: Solve for x
    x = 7,261,405.21/3,108.90
  6. Step 6: Final answer
    x = 2,335.68

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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.