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Finding the Fourth Proportional to 4,680.82, 7,021.22 and 1,393.90

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Solution

The fourth proportional to 4,680.82, 7,021.22 and 1,393.90 is: 2,090.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,680.82 : 7,021.22 = 1,393.90 : x
  2. Step 2: Convert to fraction form
    4,680.82/7,021.22 = 1,393.90/x
  3. Step 3: Cross multiply
    4,680.82x = 7,021.22 × 1,393.90
  4. Step 4: Simplify right side
    4,680.82x = 9,786,878.56
  5. Step 5: Solve for x
    x = 9,786,878.56/4,680.82
  6. Step 6: Final answer
    x = 2,090.85

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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.