Home / 3,187.89-4,399.28-1,790.61

Finding the Fourth Proportional to 3,187.89, 4,399.28 and 1,790.61

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Solution

The fourth proportional to 3,187.89, 4,399.28 and 1,790.61 is: 2,471.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,187.89 : 4,399.28 = 1,790.61 : x
  2. Step 2: Convert to fraction form
    3,187.89/4,399.28 = 1,790.61/x
  3. Step 3: Cross multiply
    3,187.89x = 4,399.28 × 1,790.61
  4. Step 4: Simplify right side
    3,187.89x = 7,877,385.81
  5. Step 5: Solve for x
    x = 7,877,385.81/3,187.89
  6. Step 6: Final answer
    x = 2,471.03

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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.