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Finding the Fourth Proportional to 626,378.77, 864,405 and 339,898.85

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Solution

The fourth proportional to 626,378.77, 864,405 and 339,898.85 is: 469,061.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    626,378.77 : 864,405 = 339,898.85 : x
  2. Step 2: Convert to fraction form
    626,378.77/864,405 = 339,898.85/x
  3. Step 3: Cross multiply
    626,378.77x = 864,405 × 339,898.85
  4. Step 4: Simplify right side
    626,378.77x = 293,810,265,434.25
  5. Step 5: Solve for x
    x = 293,810,265,434.25/626,378.77
  6. Step 6: Final answer
    x = 469,061.66

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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.