Home / 813,997.81-1,123,243.38-451,420.55

Finding the Fourth Proportional to 813,997.81, 1,123,243.38 and 451,420.55

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Solution

The fourth proportional to 813,997.81, 1,123,243.38 and 451,420.55 is: 622,919.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    813,997.81 : 1,123,243.38 = 451,420.55 : x
  2. Step 2: Convert to fraction form
    813,997.81/1,123,243.38 = 451,420.55/x
  3. Step 3: Cross multiply
    813,997.81x = 1,123,243.38 × 451,420.55
  4. Step 4: Simplify right side
    813,997.81x = 507,055,144,868.91
  5. Step 5: Solve for x
    x = 507,055,144,868.91/813,997.81
  6. Step 6: Final answer
    x = 622,919.54

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Double scale
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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.