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Finding the Fourth Proportional to 258,622.56, 356,896.80 and 145,442.88

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Solution

The fourth proportional to 258,622.56, 356,896.80 and 145,442.88 is: 200,709.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,622.56 : 356,896.80 = 145,442.88 : x
  2. Step 2: Convert to fraction form
    258,622.56/356,896.80 = 145,442.88/x
  3. Step 3: Cross multiply
    258,622.56x = 356,896.80 × 145,442.88
  4. Step 4: Simplify right side
    258,622.56x = 51,908,098,454.78
  5. Step 5: Solve for x
    x = 51,908,098,454.78/258,622.56
  6. Step 6: Final answer
    x = 200,709.86

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1.5x scale

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.