Home / 3,105.25-4,285.26-1,778.98

Finding the Fourth Proportional to 3,105.25, 4,285.26 and 1,778.98

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Solution

The fourth proportional to 3,105.25, 4,285.26 and 1,778.98 is: 2,455.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,105.25 : 4,285.26 = 1,778.98 : x
  2. Step 2: Convert to fraction form
    3,105.25/4,285.26 = 1,778.98/x
  3. Step 3: Cross multiply
    3,105.25x = 4,285.26 × 1,778.98
  4. Step 4: Simplify right side
    3,105.25x = 7,623,391.83
  5. Step 5: Solve for x
    x = 7,623,391.83/3,105.25
  6. Step 6: Final answer
    x = 2,455.00

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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.