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Finding the Fourth Proportional to 628,081.56, 866,734.02 and 356,174.28

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Solution

The fourth proportional to 628,081.56, 866,734.02 and 356,174.28 is: 491,510.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    628,081.56 : 866,734.02 = 356,174.28 : x
  2. Step 2: Convert to fraction form
    628,081.56/866,734.02 = 356,174.28/x
  3. Step 3: Cross multiply
    628,081.56x = 866,734.02 × 356,174.28
  4. Step 4: Simplify right side
    628,081.56x = 308,708,365,525.01
  5. Step 5: Solve for x
    x = 308,708,365,525.01/628,081.56
  6. Step 6: Final answer
    x = 491,510.00

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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.