Home / 2,820.45-4,231.53-1,261.76

Finding the Fourth Proportional to 2,820.45, 4,231.53 and 1,261.76

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Solution

The fourth proportional to 2,820.45, 4,231.53 and 1,261.76 is: 1,893.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,820.45 : 4,231.53 = 1,261.76 : x
  2. Step 2: Convert to fraction form
    2,820.45/4,231.53 = 1,261.76/x
  3. Step 3: Cross multiply
    2,820.45x = 4,231.53 × 1,261.76
  4. Step 4: Simplify right side
    2,820.45x = 5,339,178.45
  5. Step 5: Solve for x
    x = 5,339,178.45/2,820.45
  6. Step 6: Final answer
    x = 1,893.03

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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.