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Finding the Fourth Proportional to 573,140.80, 859,711.20 and 519,996.70

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Solution

The fourth proportional to 573,140.80, 859,711.20 and 519,996.70 is: 779,995.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    573,140.80 : 859,711.20 = 519,996.70 : x
  2. Step 2: Convert to fraction form
    573,140.80/859,711.20 = 519,996.70/x
  3. Step 3: Cross multiply
    573,140.80x = 859,711.20 × 519,996.70
  4. Step 4: Simplify right side
    573,140.80x = 447,046,986,953.04
  5. Step 5: Solve for x
    x = 447,046,986,953.04/573,140.80
  6. Step 6: Final answer
    x = 779,995.05

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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.