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Finding the Fourth Proportional to 3,369.78, 4,648.95 and 2,190.42

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Solution

The fourth proportional to 3,369.78, 4,648.95 and 2,190.42 is: 3,021.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,369.78 : 4,648.95 = 2,190.42 : x
  2. Step 2: Convert to fraction form
    3,369.78/4,648.95 = 2,190.42/x
  3. Step 3: Cross multiply
    3,369.78x = 4,648.95 × 2,190.42
  4. Step 4: Simplify right side
    3,369.78x = 10,183,153.06
  5. Step 5: Solve for x
    x = 10,183,153.06/3,369.78
  6. Step 6: Final answer
    x = 3,021.90

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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.