Home / 378,982.32-522,981.87-209,212.80

Finding the Fourth Proportional to 378,982.32, 522,981.87 and 209,212.80

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Solution

The fourth proportional to 378,982.32, 522,981.87 and 209,212.80 is: 288,706.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    378,982.32 : 522,981.87 = 209,212.80 : x
  2. Step 2: Convert to fraction form
    378,982.32/522,981.87 = 209,212.80/x
  3. Step 3: Cross multiply
    378,982.32x = 522,981.87 × 209,212.80
  4. Step 4: Simplify right side
    378,982.32x = 109,414,501,371.94
  5. Step 5: Solve for x
    x = 109,414,501,371.94/378,982.32
  6. Step 6: Final answer
    x = 288,706.08

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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.