Home / 2,108.18-3,156.60-1,284.80

Finding the Fourth Proportional to 2,108.18, 3,156.60 and 1,284.80

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Solution

The fourth proportional to 2,108.18, 3,156.60 and 1,284.80 is: 1,923.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,108.18 : 3,156.60 = 1,284.80 : x
  2. Step 2: Convert to fraction form
    2,108.18/3,156.60 = 1,284.80/x
  3. Step 3: Cross multiply
    2,108.18x = 3,156.60 × 1,284.80
  4. Step 4: Simplify right side
    2,108.18x = 4,055,599.68
  5. Step 5: Solve for x
    x = 4,055,599.68/2,108.18
  6. Step 6: Final answer
    x = 1,923.74

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1.5x scale

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.