Home / 3,111.16-4,665.51-1,378.57

Finding the Fourth Proportional to 3,111.16, 4,665.51 and 1,378.57

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Solution

The fourth proportional to 3,111.16, 4,665.51 and 1,378.57 is: 2,067.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,111.16 : 4,665.51 = 1,378.57 : x
  2. Step 2: Convert to fraction form
    3,111.16/4,665.51 = 1,378.57/x
  3. Step 3: Cross multiply
    3,111.16x = 4,665.51 × 1,378.57
  4. Step 4: Simplify right side
    3,111.16x = 6,431,708.79
  5. Step 5: Solve for x
    x = 6,431,708.79/3,111.16
  6. Step 6: Final answer
    x = 2,067.31

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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.