Home / 3,186.55-4,780.12-1,238.90

Finding the Fourth Proportional to 3,186.55, 4,780.12 and 1,238.90

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Solution

The fourth proportional to 3,186.55, 4,780.12 and 1,238.90 is: 1,858.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,186.55 : 4,780.12 = 1,238.90 : x
  2. Step 2: Convert to fraction form
    3,186.55/4,780.12 = 1,238.90/x
  3. Step 3: Cross multiply
    3,186.55x = 4,780.12 × 1,238.90
  4. Step 4: Simplify right side
    3,186.55x = 5,922,090.67
  5. Step 5: Solve for x
    x = 5,922,090.67/3,186.55
  6. Step 6: Final answer
    x = 1,858.46

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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.