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Finding the Fourth Proportional to 621,503.76, 857,666.70 and 349,571.60

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Solution

The fourth proportional to 621,503.76, 857,666.70 and 349,571.60 is: 482,404.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    621,503.76 : 857,666.70 = 349,571.60 : x
  2. Step 2: Convert to fraction form
    621,503.76/857,666.70 = 349,571.60/x
  3. Step 3: Cross multiply
    621,503.76x = 857,666.70 × 349,571.60
  4. Step 4: Simplify right side
    621,503.76x = 299,815,920,585.72
  5. Step 5: Solve for x
    x = 299,815,920,585.72/621,503.76
  6. Step 6: Final answer
    x = 482,404.03

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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.