Home / 809,039.80-1,214,558.10-509,519.80

Finding the Fourth Proportional to 809,039.80, 1,214,558.10 and 509,519.80

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Solution

The fourth proportional to 809,039.80, 1,214,558.10 and 509,519.80 is: 764,908.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    809,039.80 : 1,214,558.10 = 509,519.80 : x
  2. Step 2: Convert to fraction form
    809,039.80/1,214,558.10 = 509,519.80/x
  3. Step 3: Cross multiply
    809,039.80x = 1,214,558.10 × 509,519.80
  4. Step 4: Simplify right side
    809,039.80x = 618,841,400,200.38
  5. Step 5: Solve for x
    x = 618,841,400,200.38/809,039.80
  6. Step 6: Final answer
    x = 764,908.48

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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.