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Finding the Fourth Proportional to 1,383,427, 1,909,132.50 and 779,815

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Solution

The fourth proportional to 1,383,427, 1,909,132.50 and 779,815 is: 1,076,146.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,383,427 : 1,909,132.50 = 779,815 : x
  2. Step 2: Convert to fraction form
    1,383,427/1,909,132.50 = 779,815/x
  3. Step 3: Cross multiply
    1,383,427x = 1,909,132.50 × 779,815
  4. Step 4: Simplify right side
    1,383,427x = 1,488,770,160,487.50
  5. Step 5: Solve for x
    x = 1,488,770,160,487.50/1,383,427
  6. Step 6: Final answer
    x = 1,076,146.53

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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.