Home / 3,401.90-4,694.58-1,909.78

Finding the Fourth Proportional to 3,401.90, 4,694.58 and 1,909.78

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Solution

The fourth proportional to 3,401.90, 4,694.58 and 1,909.78 is: 2,635.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,401.90 : 4,694.58 = 1,909.78 : x
  2. Step 2: Convert to fraction form
    3,401.90/4,694.58 = 1,909.78/x
  3. Step 3: Cross multiply
    3,401.90x = 4,694.58 × 1,909.78
  4. Step 4: Simplify right side
    3,401.90x = 8,965,603.26
  5. Step 5: Solve for x
    x = 8,965,603.26/3,401.90
  6. Step 6: Final answer
    x = 2,635.47

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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.