Home / 664,982.85-917,682.20-378,521.38

Finding the Fourth Proportional to 664,982.85, 917,682.20 and 378,521.38

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Solution

The fourth proportional to 664,982.85, 917,682.20 and 378,521.38 is: 522,362.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    664,982.85 : 917,682.20 = 378,521.38 : x
  2. Step 2: Convert to fraction form
    664,982.85/917,682.20 = 378,521.38/x
  3. Step 3: Cross multiply
    664,982.85x = 917,682.20 × 378,521.38
  4. Step 4: Simplify right side
    664,982.85x = 347,362,332,745.44
  5. Step 5: Solve for x
    x = 347,362,332,745.44/664,982.85
  6. Step 6: Final answer
    x = 522,362.84

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1.5x scale

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.