Home / 378,977.77-522,986.11-209,208.25

Finding the Fourth Proportional to 378,977.77, 522,986.11 and 209,208.25

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Solution

The fourth proportional to 378,977.77, 522,986.11 and 209,208.25 is: 288,705.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    378,977.77 : 522,986.11 = 209,208.25 : x
  2. Step 2: Convert to fraction form
    378,977.77/522,986.11 = 209,208.25/x
  3. Step 3: Cross multiply
    378,977.77x = 522,986.11 × 209,208.25
  4. Step 4: Simplify right side
    378,977.77x = 109,413,008,847.41
  5. Step 5: Solve for x
    x = 109,413,008,847.41/378,977.77
  6. Step 6: Final answer
    x = 288,705.61

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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.