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Finding the Fourth Proportional to 312,637.59, 431,447.90 and 191,845.62

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Solution

The fourth proportional to 312,637.59, 431,447.90 and 191,845.62 is: 264,751.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    312,637.59 : 431,447.90 = 191,845.62 : x
  2. Step 2: Convert to fraction form
    312,637.59/431,447.90 = 191,845.62/x
  3. Step 3: Cross multiply
    312,637.59x = 431,447.90 × 191,845.62
  4. Step 4: Simplify right side
    312,637.59x = 82,771,388,913.97
  5. Step 5: Solve for x
    x = 82,771,388,913.97/312,637.59
  6. Step 6: Final answer
    x = 264,751.88

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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.