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Finding the Fourth Proportional to 628,178.50, 866,886.74 and 356,159.44

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Solution

The fourth proportional to 628,178.50, 866,886.74 and 356,159.44 is: 491,500.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    628,178.50 : 866,886.74 = 356,159.44 : x
  2. Step 2: Convert to fraction form
    628,178.50/866,886.74 = 356,159.44/x
  3. Step 3: Cross multiply
    628,178.50x = 866,886.74 × 356,159.44
  4. Step 4: Simplify right side
    628,178.50x = 308,749,895,861.83
  5. Step 5: Solve for x
    x = 308,749,895,861.83/628,178.50
  6. Step 6: Final answer
    x = 491,500.26

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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.