Home / 378,977.76-522,975.68-209,208.24

Finding the Fourth Proportional to 378,977.76, 522,975.68 and 209,208.24

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Solution

The fourth proportional to 378,977.76, 522,975.68 and 209,208.24 is: 288,699.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    378,977.76 : 522,975.68 = 209,208.24 : x
  2. Step 2: Convert to fraction form
    378,977.76/522,975.68 = 209,208.24/x
  3. Step 3: Cross multiply
    378,977.76x = 522,975.68 × 209,208.24
  4. Step 4: Simplify right side
    378,977.76x = 109,410,821,575.60
  5. Step 5: Solve for x
    x = 109,410,821,575.60/378,977.76
  6. Step 6: Final answer
    x = 288,699.85

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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.