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Finding the Fourth Proportional to 3,069.15, 4,603.89 and 878.21

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Solution

The fourth proportional to 3,069.15, 4,603.89 and 878.21 is: 1,317.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,069.15 : 4,603.89 = 878.21 : x
  2. Step 2: Convert to fraction form
    3,069.15/4,603.89 = 878.21/x
  3. Step 3: Cross multiply
    3,069.15x = 4,603.89 × 878.21
  4. Step 4: Simplify right side
    3,069.15x = 4,043,177.85
  5. Step 5: Solve for x
    x = 4,043,177.85/3,069.15
  6. Step 6: Final answer
    x = 1,317.36

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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.