Home / 378,914.91-522,865.35-209,138.10

Finding the Fourth Proportional to 378,914.91, 522,865.35 and 209,138.10

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Solution

The fourth proportional to 378,914.91, 522,865.35 and 209,138.10 is: 288,590.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    378,914.91 : 522,865.35 = 209,138.10 : x
  2. Step 2: Convert to fraction form
    378,914.91/522,865.35 = 209,138.10/x
  3. Step 3: Cross multiply
    378,914.91x = 522,865.35 × 209,138.10
  4. Step 4: Simplify right side
    378,914.91x = 109,351,063,240.51
  5. Step 5: Solve for x
    x = 109,351,063,240.51/378,914.91
  6. Step 6: Final answer
    x = 288,590.03

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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.