Home / 2,815-4,219.62-1,172.50

Finding the Fourth Proportional to 2,815, 4,219.62 and 1,172.50

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Solution

The fourth proportional to 2,815, 4,219.62 and 1,172.50 is: 1,757.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,815 : 4,219.62 = 1,172.50 : x
  2. Step 2: Convert to fraction form
    2,815/4,219.62 = 1,172.50/x
  3. Step 3: Cross multiply
    2,815x = 4,219.62 × 1,172.50
  4. Step 4: Simplify right side
    2,815x = 4,947,504.45
  5. Step 5: Solve for x
    x = 4,947,504.45/2,815
  6. Step 6: Final answer
    x = 1,757.55

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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.