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Finding the Fourth Proportional to 499,584.13, 689,384.42 and 281,780.80

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Solution

The fourth proportional to 499,584.13, 689,384.42 and 281,780.80 is: 388,834.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    499,584.13 : 689,384.42 = 281,780.80 : x
  2. Step 2: Convert to fraction form
    499,584.13/689,384.42 = 281,780.80/x
  3. Step 3: Cross multiply
    499,584.13x = 689,384.42 × 281,780.80
  4. Step 4: Simplify right side
    499,584.13x = 194,255,293,375.14
  5. Step 5: Solve for x
    x = 194,255,293,375.14/499,584.13
  6. Step 6: Final answer
    x = 388,834.00

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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.