Home / 815,418.80-1,223,711.40-342,443.60

Finding the Fourth Proportional to 815,418.80, 1,223,711.40 and 342,443.60

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Solution

The fourth proportional to 815,418.80, 1,223,711.40 and 342,443.60 is: 513,910.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    815,418.80 : 1,223,711.40 = 342,443.60 : x
  2. Step 2: Convert to fraction form
    815,418.80/1,223,711.40 = 342,443.60/x
  3. Step 3: Cross multiply
    815,418.80x = 1,223,711.40 × 342,443.60
  4. Step 4: Simplify right side
    815,418.80x = 419,052,137,177.04
  5. Step 5: Solve for x
    x = 419,052,137,177.04/815,418.80
  6. Step 6: Final answer
    x = 513,910.32

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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.