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Finding the Fourth Proportional to 1,277,648.80, 1,914,860.40 and 646,736.80

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Solution

The fourth proportional to 1,277,648.80, 1,914,860.40 and 646,736.80 is: 969,288.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,277,648.80 : 1,914,860.40 = 646,736.80 : x
  2. Step 2: Convert to fraction form
    1,277,648.80/1,914,860.40 = 646,736.80/x
  3. Step 3: Cross multiply
    1,277,648.80x = 1,914,860.40 × 646,736.80
  4. Step 4: Simplify right side
    1,277,648.80x = 1,238,410,687,542.72
  5. Step 5: Solve for x
    x = 1,238,410,687,542.72/1,277,648.80
  6. Step 6: Final answer
    x = 969,288.81

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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.