Home / 3,145.40-4,341.50-1,965.80

Finding the Fourth Proportional to 3,145.40, 4,341.50 and 1,965.80

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Solution

The fourth proportional to 3,145.40, 4,341.50 and 1,965.80 is: 2,713.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,145.40 : 4,341.50 = 1,965.80 : x
  2. Step 2: Convert to fraction form
    3,145.40/4,341.50 = 1,965.80/x
  3. Step 3: Cross multiply
    3,145.40x = 4,341.50 × 1,965.80
  4. Step 4: Simplify right side
    3,145.40x = 8,534,520.70
  5. Step 5: Solve for x
    x = 8,534,520.70/3,145.40
  6. Step 6: Final answer
    x = 2,713.33

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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.