Home / 3,105.65-4,285.82-1,689.35

Finding the Fourth Proportional to 3,105.65, 4,285.82 and 1,689.35

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Solution

The fourth proportional to 3,105.65, 4,285.82 and 1,689.35 is: 2,331.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,105.65 : 4,285.82 = 1,689.35 : x
  2. Step 2: Convert to fraction form
    3,105.65/4,285.82 = 1,689.35/x
  3. Step 3: Cross multiply
    3,105.65x = 4,285.82 × 1,689.35
  4. Step 4: Simplify right side
    3,105.65x = 7,240,258.62
  5. Step 5: Solve for x
    x = 7,240,258.62/3,105.65
  6. Step 6: Final answer
    x = 2,331.32

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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.