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Finding the Fourth Proportional to 2,768.70, 3,820.41 and 1,720.38

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Solution

The fourth proportional to 2,768.70, 3,820.41 and 1,720.38 is: 2,373.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,768.70 : 3,820.41 = 1,720.38 : x
  2. Step 2: Convert to fraction form
    2,768.70/3,820.41 = 1,720.38/x
  3. Step 3: Cross multiply
    2,768.70x = 3,820.41 × 1,720.38
  4. Step 4: Simplify right side
    2,768.70x = 6,572,556.96
  5. Step 5: Solve for x
    x = 6,572,556.96/2,768.70
  6. Step 6: Final answer
    x = 2,373.88

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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.