Home / 815,985.70-1,215,777.22-770,148.02

Finding the Fourth Proportional to 815,985.70, 1,215,777.22 and 770,148.02

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Solution

The fourth proportional to 815,985.70, 1,215,777.22 and 770,148.02 is: 1,147,481.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    815,985.70 : 1,215,777.22 = 770,148.02 : x
  2. Step 2: Convert to fraction form
    815,985.70/1,215,777.22 = 770,148.02/x
  3. Step 3: Cross multiply
    815,985.70x = 1,215,777.22 × 770,148.02
  4. Step 4: Simplify right side
    815,985.70x = 936,328,424,190.26
  5. Step 5: Solve for x
    x = 936,328,424,190.26/815,985.70
  6. Step 6: Final answer
    x = 1,147,481.42

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.