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Finding the Fourth Proportional to 518,900.23, 778,575.11 and 278,733.89

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Solution

The fourth proportional to 518,900.23, 778,575.11 and 278,733.89 is: 418,221.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    518,900.23 : 778,575.11 = 278,733.89 : x
  2. Step 2: Convert to fraction form
    518,900.23/778,575.11 = 278,733.89/x
  3. Step 3: Cross multiply
    518,900.23x = 778,575.11 × 278,733.89
  4. Step 4: Simplify right side
    518,900.23x = 217,015,269,067.48
  5. Step 5: Solve for x
    x = 217,015,269,067.48/518,900.23
  6. Step 6: Final answer
    x = 418,221.57

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.