Home / 1,283,428.80-1,766,512.80-1,209,945.60

Finding the Fourth Proportional to 1,283,428.80, 1,766,512.80 and 1,209,945.60

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Solution

The fourth proportional to 1,283,428.80, 1,766,512.80 and 1,209,945.60 is: 1,665,370.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,283,428.80 : 1,766,512.80 = 1,209,945.60 : x
  2. Step 2: Convert to fraction form
    1,283,428.80/1,766,512.80 = 1,209,945.60/x
  3. Step 3: Cross multiply
    1,283,428.80x = 1,766,512.80 × 1,209,945.60
  4. Step 4: Simplify right side
    1,283,428.80x = 2,137,384,389,703.68
  5. Step 5: Solve for x
    x = 2,137,384,389,703.68/1,283,428.80
  6. Step 6: Final answer
    x = 1,665,370.44

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.