Home / 815,985.14-1,215,776.39-770,147.46

Finding the Fourth Proportional to 815,985.14, 1,215,776.39 and 770,147.46

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Solution

The fourth proportional to 815,985.14, 1,215,776.39 and 770,147.46 is: 1,147,480.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    815,985.14 : 1,215,776.39 = 770,147.46 : x
  2. Step 2: Convert to fraction form
    815,985.14/1,215,776.39 = 770,147.46/x
  3. Step 3: Cross multiply
    815,985.14x = 1,215,776.39 × 770,147.46
  4. Step 4: Simplify right side
    815,985.14x = 936,327,094,835.73
  5. Step 5: Solve for x
    x = 936,327,094,835.73/815,985.14
  6. Step 6: Final answer
    x = 1,147,480.58

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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.