Home / 421,738.40-631,839.60-199,632.80

Finding the Fourth Proportional to 421,738.40, 631,839.60 and 199,632.80

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Solution

The fourth proportional to 421,738.40, 631,839.60 and 199,632.80 is: 299,085.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    421,738.40 : 631,839.60 = 199,632.80 : x
  2. Step 2: Convert to fraction form
    421,738.40/631,839.60 = 199,632.80/x
  3. Step 3: Cross multiply
    421,738.40x = 631,839.60 × 199,632.80
  4. Step 4: Simplify right side
    421,738.40x = 126,135,908,498.88
  5. Step 5: Solve for x
    x = 126,135,908,498.88/421,738.40
  6. Step 6: Final answer
    x = 299,085.66

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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.