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Finding the Fourth Proportional to 628,029.70, 866,876.12 and 499,196.77

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Solution

The fourth proportional to 628,029.70, 866,876.12 and 499,196.77 is: 689,046.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    628,029.70 : 866,876.12 = 499,196.77 : x
  2. Step 2: Convert to fraction form
    628,029.70/866,876.12 = 499,196.77/x
  3. Step 3: Cross multiply
    628,029.70x = 866,876.12 × 499,196.77
  4. Step 4: Simplify right side
    628,029.70x = 432,741,759,094.13
  5. Step 5: Solve for x
    x = 432,741,759,094.13/628,029.70
  6. Step 6: Final answer
    x = 689,046.65

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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.