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Finding the Fourth Proportional to 678,056.57, 935,761.80 and 376,250.57

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Solution

The fourth proportional to 678,056.57, 935,761.80 and 376,250.57 is: 519,250.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    678,056.57 : 935,761.80 = 376,250.57 : x
  2. Step 2: Convert to fraction form
    678,056.57/935,761.80 = 376,250.57/x
  3. Step 3: Cross multiply
    678,056.57x = 935,761.80 × 376,250.57
  4. Step 4: Simplify right side
    678,056.57x = 352,080,904,074.16
  5. Step 5: Solve for x
    x = 352,080,904,074.16/678,056.57
  6. Step 6: Final answer
    x = 519,250.05

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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.