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Finding the Fourth Proportional to 557,756, 769,708.22 and 303,107.20

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Solution

The fourth proportional to 557,756, 769,708.22 and 303,107.20 is: 418,290.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    557,756 : 769,708.22 = 303,107.20 : x
  2. Step 2: Convert to fraction form
    557,756/769,708.22 = 303,107.20/x
  3. Step 3: Cross multiply
    557,756x = 769,708.22 × 303,107.20
  4. Step 4: Simplify right side
    557,756x = 233,304,103,381.18
  5. Step 5: Solve for x
    x = 233,304,103,381.18/557,756
  6. Step 6: Final answer
    x = 418,290.62

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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.