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Finding the Fourth Proportional to 625,403.38, 862,739.54 and 395,573.56

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Solution

The fourth proportional to 625,403.38, 862,739.54 and 395,573.56 is: 545,690.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    625,403.38 : 862,739.54 = 395,573.56 : x
  2. Step 2: Convert to fraction form
    625,403.38/862,739.54 = 395,573.56/x
  3. Step 3: Cross multiply
    625,403.38x = 862,739.54 × 395,573.56
  4. Step 4: Simplify right side
    625,403.38x = 341,276,951,190.56
  5. Step 5: Solve for x
    x = 341,276,951,190.56/625,403.38
  6. Step 6: Final answer
    x = 545,690.93

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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.