Home / 3,189.24-4,779-1,240.38

Finding the Fourth Proportional to 3,189.24, 4,779 and 1,240.38

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Solution

The fourth proportional to 3,189.24, 4,779 and 1,240.38 is: 1,858.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,189.24 : 4,779 = 1,240.38 : x
  2. Step 2: Convert to fraction form
    3,189.24/4,779 = 1,240.38/x
  3. Step 3: Cross multiply
    3,189.24x = 4,779 × 1,240.38
  4. Step 4: Simplify right side
    3,189.24x = 5,927,776.02
  5. Step 5: Solve for x
    x = 5,927,776.02/3,189.24
  6. Step 6: Final answer
    x = 1,858.68

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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.