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Finding the Fourth Proportional to 621,113.64, 857,167.23 and 349,267.11

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Solution

The fourth proportional to 621,113.64, 857,167.23 and 349,267.11 is: 482,005.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    621,113.64 : 857,167.23 = 349,267.11 : x
  2. Step 2: Convert to fraction form
    621,113.64/857,167.23 = 349,267.11/x
  3. Step 3: Cross multiply
    621,113.64x = 857,167.23 × 349,267.11
  4. Step 4: Simplify right side
    621,113.64x = 299,380,321,208.81
  5. Step 5: Solve for x
    x = 299,380,321,208.81/621,113.64
  6. Step 6: Final answer
    x = 482,005.71

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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.