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Finding the Fourth Proportional to 719,287.70, 992,619.03 and 392,603.66

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Solution

The fourth proportional to 719,287.70, 992,619.03 and 392,603.66 is: 541,794.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    719,287.70 : 992,619.03 = 392,603.66 : x
  2. Step 2: Convert to fraction form
    719,287.70/992,619.03 = 392,603.66/x
  3. Step 3: Cross multiply
    719,287.70x = 992,619.03 × 392,603.66
  4. Step 4: Simplify right side
    719,287.70x = 389,705,864,163.65
  5. Step 5: Solve for x
    x = 389,705,864,163.65/719,287.70
  6. Step 6: Final answer
    x = 541,794.14

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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.