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Finding the Fourth Proportional to 1,263,662.78, 1,743,855.55 and 690,703.00

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Solution

The fourth proportional to 1,263,662.78, 1,743,855.55 and 690,703.00 is: 953,170.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,263,662.78 : 1,743,855.55 = 690,703.00 : x
  2. Step 2: Convert to fraction form
    1,263,662.78/1,743,855.55 = 690,703.00/x
  3. Step 3: Cross multiply
    1,263,662.78x = 1,743,855.55 × 690,703.00
  4. Step 4: Simplify right side
    1,263,662.78x = 1,204,486,253,865.25
  5. Step 5: Solve for x
    x = 1,204,486,253,865.25/1,263,662.78
  6. Step 6: Final answer
    x = 953,170.64

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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.