Home / 2,811.25-3,879.53-1,569.25

Finding the Fourth Proportional to 2,811.25, 3,879.53 and 1,569.25

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Solution

The fourth proportional to 2,811.25, 3,879.53 and 1,569.25 is: 2,165.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,811.25 : 3,879.53 = 1,569.25 : x
  2. Step 2: Convert to fraction form
    2,811.25/3,879.53 = 1,569.25/x
  3. Step 3: Cross multiply
    2,811.25x = 3,879.53 × 1,569.25
  4. Step 4: Simplify right side
    2,811.25x = 6,087,952.45
  5. Step 5: Solve for x
    x = 6,087,952.45/2,811.25
  6. Step 6: Final answer
    x = 2,165.57

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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.