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Finding the Fourth Proportional to 318,627.86, 439,552.71 and 197,909.51

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Solution

The fourth proportional to 318,627.86, 439,552.71 and 197,909.51 is: 273,019.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,627.86 : 439,552.71 = 197,909.51 : x
  2. Step 2: Convert to fraction form
    318,627.86/439,552.71 = 197,909.51/x
  3. Step 3: Cross multiply
    318,627.86x = 439,552.71 × 197,909.51
  4. Step 4: Simplify right side
    318,627.86x = 86,991,659,257.51
  5. Step 5: Solve for x
    x = 86,991,659,257.51/318,627.86
  6. Step 6: Final answer
    x = 273,019.63

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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.