Home / 815,428.80-1,223,143.20-762,940.80

Finding the Fourth Proportional to 815,428.80, 1,223,143.20 and 762,940.80

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Solution

The fourth proportional to 815,428.80, 1,223,143.20 and 762,940.80 is: 1,144,411.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    815,428.80 : 1,223,143.20 = 762,940.80 : x
  2. Step 2: Convert to fraction form
    815,428.80/1,223,143.20 = 762,940.80/x
  3. Step 3: Cross multiply
    815,428.80x = 1,223,143.20 × 762,940.80
  4. Step 4: Simplify right side
    815,428.80x = 933,185,851,522.56
  5. Step 5: Solve for x
    x = 933,185,851,522.56/815,428.80
  6. Step 6: Final answer
    x = 1,144,411.20

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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.