Home / 213,721.20-320,581.80-205,556.40

Finding the Fourth Proportional to 213,721.20, 320,581.80 and 205,556.40

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Solution

The fourth proportional to 213,721.20, 320,581.80 and 205,556.40 is: 308,334.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    213,721.20 : 320,581.80 = 205,556.40 : x
  2. Step 2: Convert to fraction form
    213,721.20/320,581.80 = 205,556.40/x
  3. Step 3: Cross multiply
    213,721.20x = 320,581.80 × 205,556.40
  4. Step 4: Simplify right side
    213,721.20x = 65,897,640,713.52
  5. Step 5: Solve for x
    x = 65,897,640,713.52/213,721.20
  6. Step 6: Final answer
    x = 308,334.60

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.