Home / 2,771.45-4,159.99-1,385.78

Finding the Fourth Proportional to 2,771.45, 4,159.99 and 1,385.78

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Solution

The fourth proportional to 2,771.45, 4,159.99 and 1,385.78 is: 2,080.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,771.45 : 4,159.99 = 1,385.78 : x
  2. Step 2: Convert to fraction form
    2,771.45/4,159.99 = 1,385.78/x
  3. Step 3: Cross multiply
    2,771.45x = 4,159.99 × 1,385.78
  4. Step 4: Simplify right side
    2,771.45x = 5,764,830.94
  5. Step 5: Solve for x
    x = 5,764,830.94/2,771.45
  6. Step 6: Final answer
    x = 2,080.08

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.