Home / 815,983.64-1,215,774.17-770,145.94

Finding the Fourth Proportional to 815,983.64, 1,215,774.17 and 770,145.94

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Solution

The fourth proportional to 815,983.64, 1,215,774.17 and 770,145.94 is: 1,147,478.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    815,983.64 : 1,215,774.17 = 770,145.94 : x
  2. Step 2: Convert to fraction form
    815,983.64/1,215,774.17 = 770,145.94/x
  3. Step 3: Cross multiply
    815,983.64x = 1,215,774.17 × 770,145.94
  4. Step 4: Simplify right side
    815,983.64x = 936,323,540,982.37
  5. Step 5: Solve for x
    x = 936,323,540,982.37/815,983.64
  6. Step 6: Final answer
    x = 1,147,478.33

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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.