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Finding the Fourth Proportional to 619,430.04, 855,179.88 and 390,183.84

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Solution

The fourth proportional to 619,430.04, 855,179.88 and 390,183.84 is: 538,684.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    619,430.04 : 855,179.88 = 390,183.84 : x
  2. Step 2: Convert to fraction form
    619,430.04/855,179.88 = 390,183.84/x
  3. Step 3: Cross multiply
    619,430.04x = 855,179.88 × 390,183.84
  4. Step 4: Simplify right side
    619,430.04x = 333,677,369,469.14
  5. Step 5: Solve for x
    x = 333,677,369,469.14/619,430.04
  6. Step 6: Final answer
    x = 538,684.51

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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.