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Finding the Fourth Proportional to 625,405.46, 863,152.10 and 395,984.08

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Solution

The fourth proportional to 625,405.46, 863,152.10 and 395,984.08 is: 546,516.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    625,405.46 : 863,152.10 = 395,984.08 : x
  2. Step 2: Convert to fraction form
    625,405.46/863,152.10 = 395,984.08/x
  3. Step 3: Cross multiply
    625,405.46x = 863,152.10 × 395,984.08
  4. Step 4: Simplify right side
    625,405.46x = 341,794,490,218.57
  5. Step 5: Solve for x
    x = 341,794,490,218.57/625,405.46
  6. Step 6: Final answer
    x = 546,516.64

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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.