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Finding the Fourth Proportional to 1,998,576.74, 2,758,936.53 and 1,274,397.86

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Solution

The fourth proportional to 1,998,576.74, 2,758,936.53 and 1,274,397.86 is: 1,759,243.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,998,576.74 : 2,758,936.53 = 1,274,397.86 : x
  2. Step 2: Convert to fraction form
    1,998,576.74/2,758,936.53 = 1,274,397.86/x
  3. Step 3: Cross multiply
    1,998,576.74x = 2,758,936.53 × 1,274,397.86
  4. Step 4: Simplify right side
    1,998,576.74x = 3,515,982,809,707.83
  5. Step 5: Solve for x
    x = 3,515,982,809,707.83/1,998,576.74
  6. Step 6: Final answer
    x = 1,759,243.34

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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.