Home / 3,105.47-4,285.49-1,689.19

Finding the Fourth Proportional to 3,105.47, 4,285.49 and 1,689.19

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Solution

The fourth proportional to 3,105.47, 4,285.49 and 1,689.19 is: 2,331.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,105.47 : 4,285.49 = 1,689.19 : x
  2. Step 2: Convert to fraction form
    3,105.47/4,285.49 = 1,689.19/x
  3. Step 3: Cross multiply
    3,105.47x = 4,285.49 × 1,689.19
  4. Step 4: Simplify right side
    3,105.47x = 7,238,976.98
  5. Step 5: Solve for x
    x = 7,238,976.98/3,105.47
  6. Step 6: Final answer
    x = 2,331.04

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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.