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Finding the Fourth Proportional to 2,625,431.85, 3,938,147.78 and 2,625,431.85

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Solution

The fourth proportional to 2,625,431.85, 3,938,147.78 and 2,625,431.85 is: 3,938,147.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,625,431.85 : 3,938,147.78 = 2,625,431.85 : x
  2. Step 2: Convert to fraction form
    2,625,431.85/3,938,147.78 = 2,625,431.85/x
  3. Step 3: Cross multiply
    2,625,431.85x = 3,938,147.78 × 2,625,431.85
  4. Step 4: Simplify right side
    2,625,431.85x = 10,339,338,598,491.63
  5. Step 5: Solve for x
    x = 10,339,338,598,491.63/2,625,431.85
  6. Step 6: Final answer
    x = 3,938,147.78

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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.