Home / 3,105.75-4,285.95-1,779.48

Finding the Fourth Proportional to 3,105.75, 4,285.95 and 1,779.48

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Solution

The fourth proportional to 3,105.75, 4,285.95 and 1,779.48 is: 2,455.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,105.75 : 4,285.95 = 1,779.48 : x
  2. Step 2: Convert to fraction form
    3,105.75/4,285.95 = 1,779.48/x
  3. Step 3: Cross multiply
    3,105.75x = 4,285.95 × 1,779.48
  4. Step 4: Simplify right side
    3,105.75x = 7,626,762.31
  5. Step 5: Solve for x
    x = 7,626,762.31/3,105.75
  6. Step 6: Final answer
    x = 2,455.69

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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.