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Finding the Fourth Proportional to 3,471.86, 4,790.75 and 1,979.54

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Solution

The fourth proportional to 3,471.86, 4,790.75 and 1,979.54 is: 2,731.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,471.86 : 4,790.75 = 1,979.54 : x
  2. Step 2: Convert to fraction form
    3,471.86/4,790.75 = 1,979.54/x
  3. Step 3: Cross multiply
    3,471.86x = 4,790.75 × 1,979.54
  4. Step 4: Simplify right side
    3,471.86x = 9,483,465.37
  5. Step 5: Solve for x
    x = 9,483,465.37/3,471.86
  6. Step 6: Final answer
    x = 2,731.52

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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.