Home / 3,138.97-4,705.77-1,288.93

Finding the Fourth Proportional to 3,138.97, 4,705.77 and 1,288.93

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Solution

The fourth proportional to 3,138.97, 4,705.77 and 1,288.93 is: 1,932.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,138.97 : 4,705.77 = 1,288.93 : x
  2. Step 2: Convert to fraction form
    3,138.97/4,705.77 = 1,288.93/x
  3. Step 3: Cross multiply
    3,138.97x = 4,705.77 × 1,288.93
  4. Step 4: Simplify right side
    3,138.97x = 6,065,408.13
  5. Step 5: Solve for x
    x = 6,065,408.13/3,138.97
  6. Step 6: Final answer
    x = 1,932.29

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.