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Finding the Fourth Proportional to 678,998.88, 937,064.16 and 392,591.52

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Solution

The fourth proportional to 678,998.88, 937,064.16 and 392,591.52 is: 541,802.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    678,998.88 : 937,064.16 = 392,591.52 : x
  2. Step 2: Convert to fraction form
    678,998.88/937,064.16 = 392,591.52/x
  3. Step 3: Cross multiply
    678,998.88x = 937,064.16 × 392,591.52
  4. Step 4: Simplify right side
    678,998.88x = 367,883,442,911.92
  5. Step 5: Solve for x
    x = 367,883,442,911.92/678,998.88
  6. Step 6: Final answer
    x = 541,802.72

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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.