Home / 809,121.60-1,213,390.80-409,629.60

Finding the Fourth Proportional to 809,121.60, 1,213,390.80 and 409,629.60

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Solution

The fourth proportional to 809,121.60, 1,213,390.80 and 409,629.60 is: 614,296.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    809,121.60 : 1,213,390.80 = 409,629.60 : x
  2. Step 2: Convert to fraction form
    809,121.60/1,213,390.80 = 409,629.60/x
  3. Step 3: Cross multiply
    809,121.60x = 1,213,390.80 × 409,629.60
  4. Step 4: Simplify right side
    809,121.60x = 497,040,788,047.68
  5. Step 5: Solve for x
    x = 497,040,788,047.68/809,121.60
  6. Step 6: Final answer
    x = 614,296.77

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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.