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Finding the Fourth Proportional to 625,406.38, 862,743.68 and 395,576.56

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Solution

The fourth proportional to 625,406.38, 862,743.68 and 395,576.56 is: 545,695.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    625,406.38 : 862,743.68 = 395,576.56 : x
  2. Step 2: Convert to fraction form
    625,406.38/862,743.68 = 395,576.56/x
  3. Step 3: Cross multiply
    625,406.38x = 862,743.68 × 395,576.56
  4. Step 4: Simplify right side
    625,406.38x = 341,281,177,096.14
  5. Step 5: Solve for x
    x = 341,281,177,096.14/625,406.38
  6. Step 6: Final answer
    x = 545,695.07

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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.