Home / 378,977.82-522,975.66-209,208.30

Finding the Fourth Proportional to 378,977.82, 522,975.66 and 209,208.30

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Solution

The fourth proportional to 378,977.82, 522,975.66 and 209,208.30 is: 288,699.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    378,977.82 : 522,975.66 = 209,208.30 : x
  2. Step 2: Convert to fraction form
    378,977.82/522,975.66 = 209,208.30/x
  3. Step 3: Cross multiply
    378,977.82x = 522,975.66 × 209,208.30
  4. Step 4: Simplify right side
    378,977.82x = 109,410,848,769.98
  5. Step 5: Solve for x
    x = 109,410,848,769.98/378,977.82
  6. Step 6: Final answer
    x = 288,699.87

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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.