Home / 815,860.97-1,223,791.44-310,305.15

Finding the Fourth Proportional to 815,860.97, 1,223,791.44 and 310,305.15

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Solution

The fourth proportional to 815,860.97, 1,223,791.44 and 310,305.15 is: 465,457.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    815,860.97 : 1,223,791.44 = 310,305.15 : x
  2. Step 2: Convert to fraction form
    815,860.97/1,223,791.44 = 310,305.15/x
  3. Step 3: Cross multiply
    815,860.97x = 1,223,791.44 × 310,305.15
  4. Step 4: Simplify right side
    815,860.97x = 379,748,786,357.92
  5. Step 5: Solve for x
    x = 379,748,786,357.92/815,860.97
  6. Step 6: Final answer
    x = 465,457.72

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Similar ratio
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1.5x scale

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.