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Finding the Fourth Proportional to 716,382.06, 988,592.14 and 394,086.30

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Solution

The fourth proportional to 716,382.06, 988,592.14 and 394,086.30 is: 543,830.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    716,382.06 : 988,592.14 = 394,086.30 : x
  2. Step 2: Convert to fraction form
    716,382.06/988,592.14 = 394,086.30/x
  3. Step 3: Cross multiply
    716,382.06x = 988,592.14 × 394,086.30
  4. Step 4: Simplify right side
    716,382.06x = 389,590,618,661.68
  5. Step 5: Solve for x
    x = 389,590,618,661.68/716,382.06
  6. Step 6: Final answer
    x = 543,830.79

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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.