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Finding the Fourth Proportional to 2,938.91, 4,408.57 and 858.97

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Solution

The fourth proportional to 2,938.91, 4,408.57 and 858.97 is: 1,288.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,938.91 : 4,408.57 = 858.97 : x
  2. Step 2: Convert to fraction form
    2,938.91/4,408.57 = 858.97/x
  3. Step 3: Cross multiply
    2,938.91x = 4,408.57 × 858.97
  4. Step 4: Simplify right side
    2,938.91x = 3,786,807.33
  5. Step 5: Solve for x
    x = 3,786,807.33/2,938.91
  6. Step 6: Final answer
    x = 1,288.51

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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.