Home / 2,072.40-3,109.08-611.52

Finding the Fourth Proportional to 2,072.40, 3,109.08 and 611.52

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Solution

The fourth proportional to 2,072.40, 3,109.08 and 611.52 is: 917.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,072.40 : 3,109.08 = 611.52 : x
  2. Step 2: Convert to fraction form
    2,072.40/3,109.08 = 611.52/x
  3. Step 3: Cross multiply
    2,072.40x = 3,109.08 × 611.52
  4. Step 4: Simplify right side
    2,072.40x = 1,901,264.60
  5. Step 5: Solve for x
    x = 1,901,264.60/2,072.40
  6. Step 6: Final answer
    x = 917.42

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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.