Home / 2,155.36-3,231.32-1,115.52

Finding the Fourth Proportional to 2,155.36, 3,231.32 and 1,115.52

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Solution

The fourth proportional to 2,155.36, 3,231.32 and 1,115.52 is: 1,672.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,155.36 : 3,231.32 = 1,115.52 : x
  2. Step 2: Convert to fraction form
    2,155.36/3,231.32 = 1,115.52/x
  3. Step 3: Cross multiply
    2,155.36x = 3,231.32 × 1,115.52
  4. Step 4: Simplify right side
    2,155.36x = 3,604,605.70
  5. Step 5: Solve for x
    x = 3,604,605.70/2,155.36
  6. Step 6: Final answer
    x = 1,672.39

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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.