Home / 813,365.56-1,220,211.42-280,906.12

Finding the Fourth Proportional to 813,365.56, 1,220,211.42 and 280,906.12

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Solution

The fourth proportional to 813,365.56, 1,220,211.42 and 280,906.12 is: 421,415.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    813,365.56 : 1,220,211.42 = 280,906.12 : x
  2. Step 2: Convert to fraction form
    813,365.56/1,220,211.42 = 280,906.12/x
  3. Step 3: Cross multiply
    813,365.56x = 1,220,211.42 × 280,906.12
  4. Step 4: Simplify right side
    813,365.56x = 342,764,855,571.89
  5. Step 5: Solve for x
    x = 342,764,855,571.89/813,365.56
  6. Step 6: Final answer
    x = 421,415.50

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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.