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Finding the Fourth Proportional to 419,857.53, 629,721.36 and 153,555.76

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Solution

The fourth proportional to 419,857.53, 629,721.36 and 153,555.76 is: 230,309.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    419,857.53 : 629,721.36 = 153,555.76 : x
  2. Step 2: Convert to fraction form
    419,857.53/629,721.36 = 153,555.76/x
  3. Step 3: Cross multiply
    419,857.53x = 629,721.36 × 153,555.76
  4. Step 4: Simplify right side
    419,857.53x = 96,697,344,127.61
  5. Step 5: Solve for x
    x = 96,697,344,127.61/419,857.53
  6. Step 6: Final answer
    x = 230,309.90

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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.