Home / 2,775.53-3,824.97-1,988.21

Finding the Fourth Proportional to 2,775.53, 3,824.97 and 1,988.21

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Solution

The fourth proportional to 2,775.53, 3,824.97 and 1,988.21 is: 2,739.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,775.53 : 3,824.97 = 1,988.21 : x
  2. Step 2: Convert to fraction form
    2,775.53/3,824.97 = 1,988.21/x
  3. Step 3: Cross multiply
    2,775.53x = 3,824.97 × 1,988.21
  4. Step 4: Simplify right side
    2,775.53x = 7,604,843.60
  5. Step 5: Solve for x
    x = 7,604,843.60/2,775.53
  6. Step 6: Final answer
    x = 2,739.96

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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.