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Finding the Fourth Proportional to 428,768.94, 591,697.11 and 235,172.71

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Solution

The fourth proportional to 428,768.94, 591,697.11 and 235,172.71 is: 324,536.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    428,768.94 : 591,697.11 = 235,172.71 : x
  2. Step 2: Convert to fraction form
    428,768.94/591,697.11 = 235,172.71/x
  3. Step 3: Cross multiply
    428,768.94x = 591,697.11 × 235,172.71
  4. Step 4: Simplify right side
    428,768.94x = 139,151,012,857.87
  5. Step 5: Solve for x
    x = 139,151,012,857.87/428,768.94
  6. Step 6: Final answer
    x = 324,536.13

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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.