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Finding the Fourth Proportional to 318,950.76, 440,627.94 and 257,605.41

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Solution

The fourth proportional to 318,950.76, 440,627.94 and 257,605.41 is: 355,879.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,950.76 : 440,627.94 = 257,605.41 : x
  2. Step 2: Convert to fraction form
    318,950.76/440,627.94 = 257,605.41/x
  3. Step 3: Cross multiply
    318,950.76x = 440,627.94 × 257,605.41
  4. Step 4: Simplify right side
    318,950.76x = 113,508,141,141.16
  5. Step 5: Solve for x
    x = 113,508,141,141.16/318,950.76
  6. Step 6: Final answer
    x = 355,879.83

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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.