Home / 378,979.32-522,977.73-209,209.80

Finding the Fourth Proportional to 378,979.32, 522,977.73 and 209,209.80

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Solution

The fourth proportional to 378,979.32, 522,977.73 and 209,209.80 is: 288,701.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    378,979.32 : 522,977.73 = 209,209.80 : x
  2. Step 2: Convert to fraction form
    378,979.32/522,977.73 = 209,209.80/x
  3. Step 3: Cross multiply
    378,979.32x = 522,977.73 × 209,209.80
  4. Step 4: Simplify right side
    378,979.32x = 109,412,066,297.75
  5. Step 5: Solve for x
    x = 109,412,066,297.75/378,979.32
  6. Step 6: Final answer
    x = 288,701.94

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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.