Home / 3,078.20-4,617.09-769.70

Finding the Fourth Proportional to 3,078.20, 4,617.09 and 769.70

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Solution

The fourth proportional to 3,078.20, 4,617.09 and 769.70 is: 1,154.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,078.20 : 4,617.09 = 769.70 : x
  2. Step 2: Convert to fraction form
    3,078.20/4,617.09 = 769.70/x
  3. Step 3: Cross multiply
    3,078.20x = 4,617.09 × 769.70
  4. Step 4: Simplify right side
    3,078.20x = 3,553,751.09
  5. Step 5: Solve for x
    x = 3,553,751.09/3,078.20
  6. Step 6: Final answer
    x = 1,154.49

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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.