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Finding the Fourth Proportional to 685,202.39, 945,361.92 and 398,667.12

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Solution

The fourth proportional to 685,202.39, 945,361.92 and 398,667.12 is: 550,034.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    685,202.39 : 945,361.92 = 398,667.12 : x
  2. Step 2: Convert to fraction form
    685,202.39/945,361.92 = 398,667.12/x
  3. Step 3: Cross multiply
    685,202.39x = 945,361.92 × 398,667.12
  4. Step 4: Simplify right side
    685,202.39x = 376,884,709,711.46
  5. Step 5: Solve for x
    x = 376,884,709,711.46/685,202.39
  6. Step 6: Final answer
    x = 550,034.14

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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.