Home / 1,378.12-2,058.26-1,247.86

Finding the Fourth Proportional to 1,378.12, 2,058.26 and 1,247.86

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Solution

The fourth proportional to 1,378.12, 2,058.26 and 1,247.86 is: 1,863.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,378.12 : 2,058.26 = 1,247.86 : x
  2. Step 2: Convert to fraction form
    1,378.12/2,058.26 = 1,247.86/x
  3. Step 3: Cross multiply
    1,378.12x = 2,058.26 × 1,247.86
  4. Step 4: Simplify right side
    1,378.12x = 2,568,420.32
  5. Step 5: Solve for x
    x = 2,568,420.32/1,378.12
  6. Step 6: Final answer
    x = 1,863.71

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.