Home / 3,655.90-5,485.06-1,190.80

Finding the Fourth Proportional to 3,655.90, 5,485.06 and 1,190.80

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Solution

The fourth proportional to 3,655.90, 5,485.06 and 1,190.80 is: 1,786.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,655.90 : 5,485.06 = 1,190.80 : x
  2. Step 2: Convert to fraction form
    3,655.90/5,485.06 = 1,190.80/x
  3. Step 3: Cross multiply
    3,655.90x = 5,485.06 × 1,190.80
  4. Step 4: Simplify right side
    3,655.90x = 6,531,609.45
  5. Step 5: Solve for x
    x = 6,531,609.45/3,655.90
  6. Step 6: Final answer
    x = 1,786.59

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1.5x scale

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.