Home / 3,105.76-4,285.86-1,708.51

Finding the Fourth Proportional to 3,105.76, 4,285.86 and 1,708.51

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Solution

The fourth proportional to 3,105.76, 4,285.86 and 1,708.51 is: 2,357.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,105.76 : 4,285.86 = 1,708.51 : x
  2. Step 2: Convert to fraction form
    3,105.76/4,285.86 = 1,708.51/x
  3. Step 3: Cross multiply
    3,105.76x = 4,285.86 × 1,708.51
  4. Step 4: Simplify right side
    3,105.76x = 7,322,434.67
  5. Step 5: Solve for x
    x = 7,322,434.67/3,105.76
  6. Step 6: Final answer
    x = 2,357.69

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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.