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Finding the Fourth Proportional to 393,908.17, 591,011.16 and 154,193.38

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Solution

The fourth proportional to 393,908.17, 591,011.16 and 154,193.38 is: 231,348.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    393,908.17 : 591,011.16 = 154,193.38 : x
  2. Step 2: Convert to fraction form
    393,908.17/591,011.16 = 154,193.38/x
  3. Step 3: Cross multiply
    393,908.17x = 591,011.16 × 154,193.38
  4. Step 4: Simplify right side
    393,908.17x = 91,130,008,378.12
  5. Step 5: Solve for x
    x = 91,130,008,378.12/393,908.17
  6. Step 6: Final answer
    x = 231,348.36

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.