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Finding the Fourth Proportional to 611,885.70, 917,828.55 and 543,651.30

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Solution

The fourth proportional to 611,885.70, 917,828.55 and 543,651.30 is: 815,476.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    611,885.70 : 917,828.55 = 543,651.30 : x
  2. Step 2: Convert to fraction form
    611,885.70/917,828.55 = 543,651.30/x
  3. Step 3: Cross multiply
    611,885.70x = 917,828.55 × 543,651.30
  4. Step 4: Simplify right side
    611,885.70x = 498,978,684,384.62
  5. Step 5: Solve for x
    x = 498,978,684,384.62/611,885.70
  6. Step 6: Final answer
    x = 815,476.95

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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.