Home / 815,999.20-1,223,998.80-455,192.80

Finding the Fourth Proportional to 815,999.20, 1,223,998.80 and 455,192.80

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Solution

The fourth proportional to 815,999.20, 1,223,998.80 and 455,192.80 is: 682,789.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    815,999.20 : 1,223,998.80 = 455,192.80 : x
  2. Step 2: Convert to fraction form
    815,999.20/1,223,998.80 = 455,192.80/x
  3. Step 3: Cross multiply
    815,999.20x = 1,223,998.80 × 455,192.80
  4. Step 4: Simplify right side
    815,999.20x = 557,155,440,968.64
  5. Step 5: Solve for x
    x = 557,155,440,968.64/815,999.20
  6. Step 6: Final answer
    x = 682,789.20

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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.