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Finding the Fourth Proportional to 3,107.98, 4,289.88 and 1,928.38

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Solution

The fourth proportional to 3,107.98, 4,289.88 and 1,928.38 is: 2,661.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,107.98 : 4,289.88 = 1,928.38 : x
  2. Step 2: Convert to fraction form
    3,107.98/4,289.88 = 1,928.38/x
  3. Step 3: Cross multiply
    3,107.98x = 4,289.88 × 1,928.38
  4. Step 4: Simplify right side
    3,107.98x = 8,272,518.79
  5. Step 5: Solve for x
    x = 8,272,518.79/3,107.98
  6. Step 6: Final answer
    x = 2,661.70

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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.