Home / 815,854.23-1,223,435.34-388,896.21

Finding the Fourth Proportional to 815,854.23, 1,223,435.34 and 388,896.21

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Solution

The fourth proportional to 815,854.23, 1,223,435.34 and 388,896.21 is: 583,179.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    815,854.23 : 1,223,435.34 = 388,896.21 : x
  2. Step 2: Convert to fraction form
    815,854.23/1,223,435.34 = 388,896.21/x
  3. Step 3: Cross multiply
    815,854.23x = 1,223,435.34 × 388,896.21
  4. Step 4: Simplify right side
    815,854.23x = 475,789,366,906.06
  5. Step 5: Solve for x
    x = 475,789,366,906.06/815,854.23
  6. Step 6: Final answer
    x = 583,179.38

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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.