Home / 2,178.99-3,268.49-1,318.77

Finding the Fourth Proportional to 2,178.99, 3,268.49 and 1,318.77

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Solution

The fourth proportional to 2,178.99, 3,268.49 and 1,318.77 is: 1,978.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,178.99 : 3,268.49 = 1,318.77 : x
  2. Step 2: Convert to fraction form
    2,178.99/3,268.49 = 1,318.77/x
  3. Step 3: Cross multiply
    2,178.99x = 3,268.49 × 1,318.77
  4. Step 4: Simplify right side
    2,178.99x = 4,310,379.96
  5. Step 5: Solve for x
    x = 4,310,379.96/2,178.99
  6. Step 6: Final answer
    x = 1,978.16

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.