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Finding the Fourth Proportional to 673,861.12, 929,818.58 and 398,180.61

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Solution

The fourth proportional to 673,861.12, 929,818.58 and 398,180.61 is: 549,424.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    673,861.12 : 929,818.58 = 398,180.61 : x
  2. Step 2: Convert to fraction form
    673,861.12/929,818.58 = 398,180.61/x
  3. Step 3: Cross multiply
    673,861.12x = 929,818.58 × 398,180.61
  4. Step 4: Simplify right side
    673,861.12x = 370,235,729,373.73
  5. Step 5: Solve for x
    x = 370,235,729,373.73/673,861.12
  6. Step 6: Final answer
    x = 549,424.38

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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.