Home / 3,107.40-4,647.60-2,780.70

Finding the Fourth Proportional to 3,107.40, 4,647.60 and 2,780.70

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Solution

The fourth proportional to 3,107.40, 4,647.60 and 2,780.70 is: 4,158.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,107.40 : 4,647.60 = 2,780.70 : x
  2. Step 2: Convert to fraction form
    3,107.40/4,647.60 = 2,780.70/x
  3. Step 3: Cross multiply
    3,107.40x = 4,647.60 × 2,780.70
  4. Step 4: Simplify right side
    3,107.40x = 12,923,581.32
  5. Step 5: Solve for x
    x = 12,923,581.32/3,107.40
  6. Step 6: Final answer
    x = 4,158.97

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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.