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Finding the Fourth Proportional to 390,732.44, 586,110.83 and 134,562.38

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Solution

The fourth proportional to 390,732.44, 586,110.83 and 134,562.38 is: 201,847.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,732.44 : 586,110.83 = 134,562.38 : x
  2. Step 2: Convert to fraction form
    390,732.44/586,110.83 = 134,562.38/x
  3. Step 3: Cross multiply
    390,732.44x = 586,110.83 × 134,562.38
  4. Step 4: Simplify right side
    390,732.44x = 78,868,464,625.21
  5. Step 5: Solve for x
    x = 78,868,464,625.21/390,732.44
  6. Step 6: Final answer
    x = 201,847.75

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.