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Finding the Fourth Proportional to 621,103.14, 857,152.73 and 349,256.61

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Solution

The fourth proportional to 621,103.14, 857,152.73 and 349,256.61 is: 481,991.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    621,103.14 : 857,152.73 = 349,256.61 : x
  2. Step 2: Convert to fraction form
    621,103.14/857,152.73 = 349,256.61/x
  3. Step 3: Cross multiply
    621,103.14x = 857,152.73 × 349,256.61
  4. Step 4: Simplify right side
    621,103.14x = 299,366,257,605.19
  5. Step 5: Solve for x
    x = 299,366,257,605.19/621,103.14
  6. Step 6: Final answer
    x = 481,991.22

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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.