Home / 2,177.75-3,005.77-1,431.78

Finding the Fourth Proportional to 2,177.75, 3,005.77 and 1,431.78

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Solution

The fourth proportional to 2,177.75, 3,005.77 and 1,431.78 is: 1,976.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,177.75 : 3,005.77 = 1,431.78 : x
  2. Step 2: Convert to fraction form
    2,177.75/3,005.77 = 1,431.78/x
  3. Step 3: Cross multiply
    2,177.75x = 3,005.77 × 1,431.78
  4. Step 4: Simplify right side
    2,177.75x = 4,303,601.37
  5. Step 5: Solve for x
    x = 4,303,601.37/2,177.75
  6. Step 6: Final answer
    x = 1,976.17

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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.