Home / 821,409.42-1,133,120.43-519,778.38

Finding the Fourth Proportional to 821,409.42, 1,133,120.43 and 519,778.38

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Solution

The fourth proportional to 821,409.42, 1,133,120.43 and 519,778.38 is: 717,025.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    821,409.42 : 1,133,120.43 = 519,778.38 : x
  2. Step 2: Convert to fraction form
    821,409.42/1,133,120.43 = 519,778.38/x
  3. Step 3: Cross multiply
    821,409.42x = 1,133,120.43 × 519,778.38
  4. Step 4: Simplify right side
    821,409.42x = 588,971,501,450.30
  5. Step 5: Solve for x
    x = 588,971,501,450.30/821,409.42
  6. Step 6: Final answer
    x = 717,025.50

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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.