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Finding the Fourth Proportional to 3,425.94, 5,138.93 and 1,085.90

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Solution

The fourth proportional to 3,425.94, 5,138.93 and 1,085.90 is: 1,628.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,425.94 : 5,138.93 = 1,085.90 : x
  2. Step 2: Convert to fraction form
    3,425.94/5,138.93 = 1,085.90/x
  3. Step 3: Cross multiply
    3,425.94x = 5,138.93 × 1,085.90
  4. Step 4: Simplify right side
    3,425.94x = 5,580,335.68
  5. Step 5: Solve for x
    x = 5,580,335.68/3,425.94
  6. Step 6: Final answer
    x = 1,628.85

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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.