Home / 3,108.75-4,290.06-1,692.40

Finding the Fourth Proportional to 3,108.75, 4,290.06 and 1,692.40

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Solution

The fourth proportional to 3,108.75, 4,290.06 and 1,692.40 is: 2,335.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,108.75 : 4,290.06 = 1,692.40 : x
  2. Step 2: Convert to fraction form
    3,108.75/4,290.06 = 1,692.40/x
  3. Step 3: Cross multiply
    3,108.75x = 4,290.06 × 1,692.40
  4. Step 4: Simplify right side
    3,108.75x = 7,260,497.54
  5. Step 5: Solve for x
    x = 7,260,497.54/3,108.75
  6. Step 6: Final answer
    x = 2,335.50

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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.