Home / 812,743.23-1,120,811.71-486,003.03

Finding the Fourth Proportional to 812,743.23, 1,120,811.71 and 486,003.03

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Solution

The fourth proportional to 812,743.23, 1,120,811.71 and 486,003.03 is: 670,221.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    812,743.23 : 1,120,811.71 = 486,003.03 : x
  2. Step 2: Convert to fraction form
    812,743.23/1,120,811.71 = 486,003.03/x
  3. Step 3: Cross multiply
    812,743.23x = 1,120,811.71 × 486,003.03
  4. Step 4: Simplify right side
    812,743.23x = 544,717,881,701.43
  5. Step 5: Solve for x
    x = 544,717,881,701.43/812,743.23
  6. Step 6: Final answer
    x = 670,221.37

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1.5x scale

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.