Home / 2,275.10-3,138.86-1,379.12

Finding the Fourth Proportional to 2,275.10, 3,138.86 and 1,379.12

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Solution

The fourth proportional to 2,275.10, 3,138.86 and 1,379.12 is: 1,902.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,275.10 : 3,138.86 = 1,379.12 : x
  2. Step 2: Convert to fraction form
    2,275.10/3,138.86 = 1,379.12/x
  3. Step 3: Cross multiply
    2,275.10x = 3,138.86 × 1,379.12
  4. Step 4: Simplify right side
    2,275.10x = 4,328,852.36
  5. Step 5: Solve for x
    x = 4,328,852.36/2,275.10
  6. Step 6: Final answer
    x = 1,902.71

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.