Home / 3,139.10-4,707.07-1,190.90

Finding the Fourth Proportional to 3,139.10, 4,707.07 and 1,190.90

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Solution

The fourth proportional to 3,139.10, 4,707.07 and 1,190.90 is: 1,785.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,139.10 : 4,707.07 = 1,190.90 : x
  2. Step 2: Convert to fraction form
    3,139.10/4,707.07 = 1,190.90/x
  3. Step 3: Cross multiply
    3,139.10x = 4,707.07 × 1,190.90
  4. Step 4: Simplify right side
    3,139.10x = 5,605,649.66
  5. Step 5: Solve for x
    x = 5,605,649.66/3,139.10
  6. Step 6: Final answer
    x = 1,785.75

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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.