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Finding the Fourth Proportional to 312,768.39, 431,615.69 and 176,797.56

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Solution

The fourth proportional to 312,768.39, 431,615.69 and 176,797.56 is: 243,977.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    312,768.39 : 431,615.69 = 176,797.56 : x
  2. Step 2: Convert to fraction form
    312,768.39/431,615.69 = 176,797.56/x
  3. Step 3: Cross multiply
    312,768.39x = 431,615.69 × 176,797.56
  4. Step 4: Simplify right side
    312,768.39x = 76,308,600,849.72
  5. Step 5: Solve for x
    x = 76,308,600,849.72/312,768.39
  6. Step 6: Final answer
    x = 243,977.98

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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.