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Finding the Fourth Proportional to 628,025.16, 866,656.16 and 356,117.88

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Solution

The fourth proportional to 628,025.16, 866,656.16 and 356,117.88 is: 491,432.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    628,025.16 : 866,656.16 = 356,117.88 : x
  2. Step 2: Convert to fraction form
    628,025.16/866,656.16 = 356,117.88/x
  3. Step 3: Cross multiply
    628,025.16x = 866,656.16 × 356,117.88
  4. Step 4: Simplify right side
    628,025.16x = 308,631,754,388.14
  5. Step 5: Solve for x
    x = 308,631,754,388.14/628,025.16
  6. Step 6: Final answer
    x = 491,432.15

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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.