Home / 812,481.54-1,121,146.29-485,729.97

Finding the Fourth Proportional to 812,481.54, 1,121,146.29 and 485,729.97

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Solution

The fourth proportional to 812,481.54, 1,121,146.29 and 485,729.97 is: 670,260.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    812,481.54 : 1,121,146.29 = 485,729.97 : x
  2. Step 2: Convert to fraction form
    812,481.54/1,121,146.29 = 485,729.97/x
  3. Step 3: Cross multiply
    812,481.54x = 1,121,146.29 × 485,729.97
  4. Step 4: Simplify right side
    812,481.54x = 544,574,353,807.31
  5. Step 5: Solve for x
    x = 544,574,353,807.31/812,481.54
  6. Step 6: Final answer
    x = 670,260.59

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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.