Home / 815,436.80-1,223,738.40-342,461.60

Finding the Fourth Proportional to 815,436.80, 1,223,738.40 and 342,461.60

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Solution

The fourth proportional to 815,436.80, 1,223,738.40 and 342,461.60 is: 513,937.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    815,436.80 : 1,223,738.40 = 342,461.60 : x
  2. Step 2: Convert to fraction form
    815,436.80/1,223,738.40 = 342,461.60/x
  3. Step 3: Cross multiply
    815,436.80x = 1,223,738.40 × 342,461.60
  4. Step 4: Simplify right side
    815,436.80x = 419,083,410,445.44
  5. Step 5: Solve for x
    x = 419,083,410,445.44/815,436.80
  6. Step 6: Final answer
    x = 513,937.33

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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.