Home / 3,112.82-4,669.25-921.57

Finding the Fourth Proportional to 3,112.82, 4,669.25 and 921.57

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Solution

The fourth proportional to 3,112.82, 4,669.25 and 921.57 is: 1,382.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,112.82 : 4,669.25 = 921.57 : x
  2. Step 2: Convert to fraction form
    3,112.82/4,669.25 = 921.57/x
  3. Step 3: Cross multiply
    3,112.82x = 4,669.25 × 921.57
  4. Step 4: Simplify right side
    3,112.82x = 4,303,040.72
  5. Step 5: Solve for x
    x = 4,303,040.72/3,112.82
  6. Step 6: Final answer
    x = 1,382.36

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1.5x scale

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.