Home / 2,115.20-3,172.09-1,004.46

Finding the Fourth Proportional to 2,115.20, 3,172.09 and 1,004.46

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Solution

The fourth proportional to 2,115.20, 3,172.09 and 1,004.46 is: 1,506.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,115.20 : 3,172.09 = 1,004.46 : x
  2. Step 2: Convert to fraction form
    2,115.20/3,172.09 = 1,004.46/x
  3. Step 3: Cross multiply
    2,115.20x = 3,172.09 × 1,004.46
  4. Step 4: Simplify right side
    2,115.20x = 3,186,237.52
  5. Step 5: Solve for x
    x = 3,186,237.52/2,115.20
  6. Step 6: Final answer
    x = 1,506.36

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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.