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Finding the Fourth Proportional to 3,078.56, 4,617.84 and 770.06

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Solution

The fourth proportional to 3,078.56, 4,617.84 and 770.06 is: 1,155.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,078.56 : 4,617.84 = 770.06 : x
  2. Step 2: Convert to fraction form
    3,078.56/4,617.84 = 770.06/x
  3. Step 3: Cross multiply
    3,078.56x = 4,617.84 × 770.06
  4. Step 4: Simplify right side
    3,078.56x = 3,556,013.87
  5. Step 5: Solve for x
    x = 3,556,013.87/3,078.56
  6. Step 6: Final answer
    x = 1,155.09

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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.