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Finding the Fourth Proportional to 617,437.80, 927,711.90 and 392,905.80

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Solution

The fourth proportional to 617,437.80, 927,711.90 and 392,905.80 is: 590,348.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    617,437.80 : 927,711.90 = 392,905.80 : x
  2. Step 2: Convert to fraction form
    617,437.80/927,711.90 = 392,905.80/x
  3. Step 3: Cross multiply
    617,437.80x = 927,711.90 × 392,905.80
  4. Step 4: Simplify right side
    617,437.80x = 364,503,386,239.02
  5. Step 5: Solve for x
    x = 364,503,386,239.02/617,437.80
  6. Step 6: Final answer
    x = 590,348.35

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.