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Finding the Fourth Proportional to 557,821.17, 769,793.31 and 303,172.38

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Solution

The fourth proportional to 557,821.17, 769,793.31 and 303,172.38 is: 418,377.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    557,821.17 : 769,793.31 = 303,172.38 : x
  2. Step 2: Convert to fraction form
    557,821.17/769,793.31 = 303,172.38/x
  3. Step 3: Cross multiply
    557,821.17x = 769,793.31 × 303,172.38
  4. Step 4: Simplify right side
    557,821.17x = 233,380,069,900.78
  5. Step 5: Solve for x
    x = 233,380,069,900.78/557,821.17
  6. Step 6: Final answer
    x = 418,377.94

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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.