Home / 815,855.78-1,223,437.59-388,897.67

Finding the Fourth Proportional to 815,855.78, 1,223,437.59 and 388,897.67

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Solution

The fourth proportional to 815,855.78, 1,223,437.59 and 388,897.67 is: 583,181.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    815,855.78 : 1,223,437.59 = 388,897.67 : x
  2. Step 2: Convert to fraction form
    815,855.78/1,223,437.59 = 388,897.67/x
  3. Step 3: Cross multiply
    815,855.78x = 1,223,437.59 × 388,897.67
  4. Step 4: Simplify right side
    815,855.78x = 475,792,022,024.23
  5. Step 5: Solve for x
    x = 475,792,022,024.23/815,855.78
  6. Step 6: Final answer
    x = 583,181.53

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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.