Home / 5,278-7,919.72-2,318.52

Finding the Fourth Proportional to 5,278, 7,919.72 and 2,318.52

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Solution

The fourth proportional to 5,278, 7,919.72 and 2,318.52 is: 3,478.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,278 : 7,919.72 = 2,318.52 : x
  2. Step 2: Convert to fraction form
    5,278/7,919.72 = 2,318.52/x
  3. Step 3: Cross multiply
    5,278x = 7,919.72 × 2,318.52
  4. Step 4: Simplify right side
    5,278x = 18,362,029.21
  5. Step 5: Solve for x
    x = 18,362,029.21/5,278
  6. Step 6: Final answer
    x = 3,478.97

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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.