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Finding the Fourth Proportional to 716,339.88, 988,528.05 and 394,049.79

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Solution

The fourth proportional to 716,339.88, 988,528.05 and 394,049.79 is: 543,777.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    716,339.88 : 988,528.05 = 394,049.79 : x
  2. Step 2: Convert to fraction form
    716,339.88/988,528.05 = 394,049.79/x
  3. Step 3: Cross multiply
    716,339.88x = 988,528.05 × 394,049.79
  4. Step 4: Simplify right side
    716,339.88x = 389,529,270,511.61
  5. Step 5: Solve for x
    x = 389,529,270,511.61/716,339.88
  6. Step 6: Final answer
    x = 543,777.17

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Double scale
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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.