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Finding the Fourth Proportional to 2,738.79, 3,779.67 and 1,620.39

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Solution

The fourth proportional to 2,738.79, 3,779.67 and 1,620.39 is: 2,236.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,738.79 : 3,779.67 = 1,620.39 : x
  2. Step 2: Convert to fraction form
    2,738.79/3,779.67 = 1,620.39/x
  3. Step 3: Cross multiply
    2,738.79x = 3,779.67 × 1,620.39
  4. Step 4: Simplify right side
    2,738.79x = 6,124,520.57
  5. Step 5: Solve for x
    x = 6,124,520.57/2,738.79
  6. Step 6: Final answer
    x = 2,236.21

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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.