Home / 3,109.05-4,290.35-1,692.70

Finding the Fourth Proportional to 3,109.05, 4,290.35 and 1,692.70

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Solution

The fourth proportional to 3,109.05, 4,290.35 and 1,692.70 is: 2,335.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,109.05 : 4,290.35 = 1,692.70 : x
  2. Step 2: Convert to fraction form
    3,109.05/4,290.35 = 1,692.70/x
  3. Step 3: Cross multiply
    3,109.05x = 4,290.35 × 1,692.70
  4. Step 4: Simplify right side
    3,109.05x = 7,262,269.10
  5. Step 5: Solve for x
    x = 7,262,269.10/3,109.05
  6. Step 6: Final answer
    x = 2,335.85

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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.