Home / 3,187.70-4,399.05-1,790.45

Finding the Fourth Proportional to 3,187.70, 4,399.05 and 1,790.45

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Solution

The fourth proportional to 3,187.70, 4,399.05 and 1,790.45 is: 2,470.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,187.70 : 4,399.05 = 1,790.45 : x
  2. Step 2: Convert to fraction form
    3,187.70/4,399.05 = 1,790.45/x
  3. Step 3: Cross multiply
    3,187.70x = 4,399.05 × 1,790.45
  4. Step 4: Simplify right side
    3,187.70x = 7,876,279.07
  5. Step 5: Solve for x
    x = 7,876,279.07/3,187.70
  6. Step 6: Final answer
    x = 2,470.83

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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.