Home / 3,108.78-4,289.98-1,692.47

Finding the Fourth Proportional to 3,108.78, 4,289.98 and 1,692.47

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Solution

The fourth proportional to 3,108.78, 4,289.98 and 1,692.47 is: 2,335.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,108.78 : 4,289.98 = 1,692.47 : x
  2. Step 2: Convert to fraction form
    3,108.78/4,289.98 = 1,692.47/x
  3. Step 3: Cross multiply
    3,108.78x = 4,289.98 × 1,692.47
  4. Step 4: Simplify right side
    3,108.78x = 7,260,668.94
  5. Step 5: Solve for x
    x = 7,260,668.94/3,108.78
  6. Step 6: Final answer
    x = 2,335.54

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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.