Home / 3,105.13-4,283.86-1,778.12

Finding the Fourth Proportional to 3,105.13, 4,283.86 and 1,778.12

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Solution

The fourth proportional to 3,105.13, 4,283.86 and 1,778.12 is: 2,453.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,105.13 : 4,283.86 = 1,778.12 : x
  2. Step 2: Convert to fraction form
    3,105.13/4,283.86 = 1,778.12/x
  3. Step 3: Cross multiply
    3,105.13x = 4,283.86 × 1,778.12
  4. Step 4: Simplify right side
    3,105.13x = 7,617,186.83
  5. Step 5: Solve for x
    x = 7,617,186.83/3,105.13
  6. Step 6: Final answer
    x = 2,453.10

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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.