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Finding the Fourth Proportional to 391,985.68, 541,172.13 and 246,915.82

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Solution

The fourth proportional to 391,985.68, 541,172.13 and 246,915.82 is: 340,889.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,985.68 : 541,172.13 = 246,915.82 : x
  2. Step 2: Convert to fraction form
    391,985.68/541,172.13 = 246,915.82/x
  3. Step 3: Cross multiply
    391,985.68x = 541,172.13 × 246,915.82
  4. Step 4: Simplify right side
    391,985.68x = 133,623,960,240.10
  5. Step 5: Solve for x
    x = 133,623,960,240.10/391,985.68
  6. Step 6: Final answer
    x = 340,889.90

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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.