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Finding the Fourth Proportional to 625,400.12, 863,144.76 and 395,978.76

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Solution

The fourth proportional to 625,400.12, 863,144.76 and 395,978.76 is: 546,509.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    625,400.12 : 863,144.76 = 395,978.76 : x
  2. Step 2: Convert to fraction form
    625,400.12/863,144.76 = 395,978.76/x
  3. Step 3: Cross multiply
    625,400.12x = 863,144.76 × 395,978.76
  4. Step 4: Simplify right side
    625,400.12x = 341,786,991,765.30
  5. Step 5: Solve for x
    x = 341,786,991,765.30/625,400.12
  6. Step 6: Final answer
    x = 546,509.32

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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.