Home / 3,108.93-4,288.14-1,990.20

Finding the Fourth Proportional to 3,108.93, 4,288.14 and 1,990.20

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Solution

The fourth proportional to 3,108.93, 4,288.14 and 1,990.20 is: 2,745.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,108.93 : 4,288.14 = 1,990.20 : x
  2. Step 2: Convert to fraction form
    3,108.93/4,288.14 = 1,990.20/x
  3. Step 3: Cross multiply
    3,108.93x = 4,288.14 × 1,990.20
  4. Step 4: Simplify right side
    3,108.93x = 8,534,256.23
  5. Step 5: Solve for x
    x = 8,534,256.23/3,108.93
  6. Step 6: Final answer
    x = 2,745.08

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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.