Home / 3,083.40-4,255.20-1,905.12

Finding the Fourth Proportional to 3,083.40, 4,255.20 and 1,905.12

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Solution

The fourth proportional to 3,083.40, 4,255.20 and 1,905.12 is: 2,629.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,083.40 : 4,255.20 = 1,905.12 : x
  2. Step 2: Convert to fraction form
    3,083.40/4,255.20 = 1,905.12/x
  3. Step 3: Cross multiply
    3,083.40x = 4,255.20 × 1,905.12
  4. Step 4: Simplify right side
    3,083.40x = 8,106,666.62
  5. Step 5: Solve for x
    x = 8,106,666.62/3,083.40
  6. Step 6: Final answer
    x = 2,629.13

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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.