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Finding the Fourth Proportional to 3,078.06, 4,617.09 and 769.56

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Solution

The fourth proportional to 3,078.06, 4,617.09 and 769.56 is: 1,154.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,078.06 : 4,617.09 = 769.56 : x
  2. Step 2: Convert to fraction form
    3,078.06/4,617.09 = 769.56/x
  3. Step 3: Cross multiply
    3,078.06x = 4,617.09 × 769.56
  4. Step 4: Simplify right side
    3,078.06x = 3,553,127.78
  5. Step 5: Solve for x
    x = 3,553,127.78/3,078.06
  6. Step 6: Final answer
    x = 1,154.34

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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.