Home / 5,190.47-7,787.25-2,418.78

Finding the Fourth Proportional to 5,190.47, 7,787.25 and 2,418.78

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Solution

The fourth proportional to 5,190.47, 7,787.25 and 2,418.78 is: 3,628.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,190.47 : 7,787.25 = 2,418.78 : x
  2. Step 2: Convert to fraction form
    5,190.47/7,787.25 = 2,418.78/x
  3. Step 3: Cross multiply
    5,190.47x = 7,787.25 × 2,418.78
  4. Step 4: Simplify right side
    5,190.47x = 18,835,644.56
  5. Step 5: Solve for x
    x = 18,835,644.56/5,190.47
  6. Step 6: Final answer
    x = 3,628.89

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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.