Home / 3,105.61-4,285.77-1,689.31

Finding the Fourth Proportional to 3,105.61, 4,285.77 and 1,689.31

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Solution

The fourth proportional to 3,105.61, 4,285.77 and 1,689.31 is: 2,331.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,105.61 : 4,285.77 = 1,689.31 : x
  2. Step 2: Convert to fraction form
    3,105.61/4,285.77 = 1,689.31/x
  3. Step 3: Cross multiply
    3,105.61x = 4,285.77 × 1,689.31
  4. Step 4: Simplify right side
    3,105.61x = 7,239,994.12
  5. Step 5: Solve for x
    x = 7,239,994.12/3,105.61
  6. Step 6: Final answer
    x = 2,331.26

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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.