Home / 3,489.42-4,815.18-1,917.38

Finding the Fourth Proportional to 3,489.42, 4,815.18 and 1,917.38

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Solution

The fourth proportional to 3,489.42, 4,815.18 and 1,917.38 is: 2,645.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,489.42 : 4,815.18 = 1,917.38 : x
  2. Step 2: Convert to fraction form
    3,489.42/4,815.18 = 1,917.38/x
  3. Step 3: Cross multiply
    3,489.42x = 4,815.18 × 1,917.38
  4. Step 4: Simplify right side
    3,489.42x = 9,232,529.83
  5. Step 5: Solve for x
    x = 9,232,529.83/3,489.42
  6. Step 6: Final answer
    x = 2,645.86

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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.