Home / 815,985.89-1,215,777.50-770,148.21

Finding the Fourth Proportional to 815,985.89, 1,215,777.50 and 770,148.21

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Solution

The fourth proportional to 815,985.89, 1,215,777.50 and 770,148.21 is: 1,147,481.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    815,985.89 : 1,215,777.50 = 770,148.21 : x
  2. Step 2: Convert to fraction form
    815,985.89/1,215,777.50 = 770,148.21/x
  3. Step 3: Cross multiply
    815,985.89x = 1,215,777.50 × 770,148.21
  4. Step 4: Simplify right side
    815,985.89x = 936,328,867,308.65
  5. Step 5: Solve for x
    x = 936,328,867,308.65/815,985.89
  6. Step 6: Final answer
    x = 1,147,481.70

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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.