Home / 2,775.28-3,824.60-1,987.96

Finding the Fourth Proportional to 2,775.28, 3,824.60 and 1,987.96

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Solution

The fourth proportional to 2,775.28, 3,824.60 and 1,987.96 is: 2,739.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,775.28 : 3,824.60 = 1,987.96 : x
  2. Step 2: Convert to fraction form
    2,775.28/3,824.60 = 1,987.96/x
  3. Step 3: Cross multiply
    2,775.28x = 3,824.60 × 1,987.96
  4. Step 4: Simplify right side
    2,775.28x = 7,603,151.82
  5. Step 5: Solve for x
    x = 7,603,151.82/2,775.28
  6. Step 6: Final answer
    x = 2,739.60

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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.