Home / 3,105.72-4,285.70-1,708.20

Finding the Fourth Proportional to 3,105.72, 4,285.70 and 1,708.20

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Solution

The fourth proportional to 3,105.72, 4,285.70 and 1,708.20 is: 2,357.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,105.72 : 4,285.70 = 1,708.20 : x
  2. Step 2: Convert to fraction form
    3,105.72/4,285.70 = 1,708.20/x
  3. Step 3: Cross multiply
    3,105.72x = 4,285.70 × 1,708.20
  4. Step 4: Simplify right side
    3,105.72x = 7,320,832.74
  5. Step 5: Solve for x
    x = 7,320,832.74/3,105.72
  6. Step 6: Final answer
    x = 2,357.21

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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.