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Finding the Fourth Proportional to 3,135.69, 4,702.86 and 1,286.73

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Solution

The fourth proportional to 3,135.69, 4,702.86 and 1,286.73 is: 1,929.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,135.69 : 4,702.86 = 1,286.73 : x
  2. Step 2: Convert to fraction form
    3,135.69/4,702.86 = 1,286.73/x
  3. Step 3: Cross multiply
    3,135.69x = 4,702.86 × 1,286.73
  4. Step 4: Simplify right side
    3,135.69x = 6,051,311.05
  5. Step 5: Solve for x
    x = 6,051,311.05/3,135.69
  6. Step 6: Final answer
    x = 1,929.82

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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.