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Finding the Fourth Proportional to 490,745.90, 687,744.10 and 490,745.90

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Solution

The fourth proportional to 490,745.90, 687,744.10 and 490,745.90 is: 687,744.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    490,745.90 : 687,744.10 = 490,745.90 : x
  2. Step 2: Convert to fraction form
    490,745.90/687,744.10 = 490,745.90/x
  3. Step 3: Cross multiply
    490,745.90x = 687,744.10 × 490,745.90
  4. Step 4: Simplify right side
    490,745.90x = 337,507,597,324.19
  5. Step 5: Solve for x
    x = 337,507,597,324.19/490,745.90
  6. Step 6: Final answer
    x = 687,744.10

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Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.