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Finding the Fourth Proportional to 619,803.20, 929,704.80 and 545,007.80

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Solution

The fourth proportional to 619,803.20, 929,704.80 and 545,007.80 is: 817,511.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    619,803.20 : 929,704.80 = 545,007.80 : x
  2. Step 2: Convert to fraction form
    619,803.20/929,704.80 = 545,007.80/x
  3. Step 3: Cross multiply
    619,803.20x = 929,704.80 × 545,007.80
  4. Step 4: Simplify right side
    619,803.20x = 506,696,367,697.44
  5. Step 5: Solve for x
    x = 506,696,367,697.44/619,803.20
  6. Step 6: Final answer
    x = 817,511.70

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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.