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Finding the Fourth Proportional to 3,471.44, 4,790.72 and 1,979.60

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Solution

The fourth proportional to 3,471.44, 4,790.72 and 1,979.60 is: 2,731.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,471.44 : 4,790.72 = 1,979.60 : x
  2. Step 2: Convert to fraction form
    3,471.44/4,790.72 = 1,979.60/x
  3. Step 3: Cross multiply
    3,471.44x = 4,790.72 × 1,979.60
  4. Step 4: Simplify right side
    3,471.44x = 9,483,709.31
  5. Step 5: Solve for x
    x = 9,483,709.31/3,471.44
  6. Step 6: Final answer
    x = 2,731.92

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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.