Home / 812,955.69-1,220,189.81-413,894.97

Finding the Fourth Proportional to 812,955.69, 1,220,189.81 and 413,894.97

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Solution

The fourth proportional to 812,955.69, 1,220,189.81 and 413,894.97 is: 621,227.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    812,955.69 : 1,220,189.81 = 413,894.97 : x
  2. Step 2: Convert to fraction form
    812,955.69/1,220,189.81 = 413,894.97/x
  3. Step 3: Cross multiply
    812,955.69x = 1,220,189.81 × 413,894.97
  4. Step 4: Simplify right side
    812,955.69x = 505,030,422,734.78
  5. Step 5: Solve for x
    x = 505,030,422,734.78/812,955.69
  6. Step 6: Final answer
    x = 621,227.49

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Double scale
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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.