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Finding the Fourth Proportional to 516,840.52, 713,223.30 and 287,396.68

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Solution

The fourth proportional to 516,840.52, 713,223.30 and 287,396.68 is: 396,598.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    516,840.52 : 713,223.30 = 287,396.68 : x
  2. Step 2: Convert to fraction form
    516,840.52/713,223.30 = 287,396.68/x
  3. Step 3: Cross multiply
    516,840.52x = 713,223.30 × 287,396.68
  4. Step 4: Simplify right side
    516,840.52x = 204,978,008,518.64
  5. Step 5: Solve for x
    x = 204,978,008,518.64/516,840.52
  6. Step 6: Final answer
    x = 396,598.18

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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.