Home / 3,145.14-4,336.28-1,965.78

Finding the Fourth Proportional to 3,145.14, 4,336.28 and 1,965.78

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Solution

The fourth proportional to 3,145.14, 4,336.28 and 1,965.78 is: 2,710.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,145.14 : 4,336.28 = 1,965.78 : x
  2. Step 2: Convert to fraction form
    3,145.14/4,336.28 = 1,965.78/x
  3. Step 3: Cross multiply
    3,145.14x = 4,336.28 × 1,965.78
  4. Step 4: Simplify right side
    3,145.14x = 8,524,172.50
  5. Step 5: Solve for x
    x = 8,524,172.50/3,145.14
  6. Step 6: Final answer
    x = 2,710.27

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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.