Home / 5,190.40-7,168.71-3,780.37

Finding the Fourth Proportional to 5,190.40, 7,168.71 and 3,780.37

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Solution

The fourth proportional to 5,190.40, 7,168.71 and 3,780.37 is: 5,221.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,190.40 : 7,168.71 = 3,780.37 : x
  2. Step 2: Convert to fraction form
    5,190.40/7,168.71 = 3,780.37/x
  3. Step 3: Cross multiply
    5,190.40x = 7,168.71 × 3,780.37
  4. Step 4: Simplify right side
    5,190.40x = 27,100,376.22
  5. Step 5: Solve for x
    x = 27,100,376.22/5,190.40
  6. Step 6: Final answer
    x = 5,221.25

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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.