Home / 809,128.80-1,213,693.20-335,764.80

Finding the Fourth Proportional to 809,128.80, 1,213,693.20 and 335,764.80

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Solution

The fourth proportional to 809,128.80, 1,213,693.20 and 335,764.80 is: 503,647.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    809,128.80 : 1,213,693.20 = 335,764.80 : x
  2. Step 2: Convert to fraction form
    809,128.80/1,213,693.20 = 335,764.80/x
  3. Step 3: Cross multiply
    809,128.80x = 1,213,693.20 × 335,764.80
  4. Step 4: Simplify right side
    809,128.80x = 407,515,454,559.36
  5. Step 5: Solve for x
    x = 407,515,454,559.36/809,128.80
  6. Step 6: Final answer
    x = 503,647.20

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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.