Home / 2,578.81-3,558.73-1,399.85

Finding the Fourth Proportional to 2,578.81, 3,558.73 and 1,399.85

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Solution

The fourth proportional to 2,578.81, 3,558.73 and 1,399.85 is: 1,931.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,578.81 : 3,558.73 = 1,399.85 : x
  2. Step 2: Convert to fraction form
    2,578.81/3,558.73 = 1,399.85/x
  3. Step 3: Cross multiply
    2,578.81x = 3,558.73 × 1,399.85
  4. Step 4: Simplify right side
    2,578.81x = 4,981,688.19
  5. Step 5: Solve for x
    x = 4,981,688.19/2,578.81
  6. Step 6: Final answer
    x = 1,931.78

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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.