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Finding the Fourth Proportional to 625,116.64, 862,485.92 and 392,568.64

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Solution

The fourth proportional to 625,116.64, 862,485.92 and 392,568.64 is: 541,634.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    625,116.64 : 862,485.92 = 392,568.64 : x
  2. Step 2: Convert to fraction form
    625,116.64/862,485.92 = 392,568.64/x
  3. Step 3: Cross multiply
    625,116.64x = 862,485.92 × 392,568.64
  4. Step 4: Simplify right side
    625,116.64x = 338,584,924,633.55
  5. Step 5: Solve for x
    x = 338,584,924,633.55/625,116.64
  6. Step 6: Final answer
    x = 541,634.80

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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.