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Finding the Fourth Proportional to 557,960.40, 769,976.28 and 303,318

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Solution

The fourth proportional to 557,960.40, 769,976.28 and 303,318 is: 418,573.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    557,960.40 : 769,976.28 = 303,318 : x
  2. Step 2: Convert to fraction form
    557,960.40/769,976.28 = 303,318/x
  3. Step 3: Cross multiply
    557,960.40x = 769,976.28 × 303,318
  4. Step 4: Simplify right side
    557,960.40x = 233,547,665,297.04
  5. Step 5: Solve for x
    x = 233,547,665,297.04/557,960.40
  6. Step 6: Final answer
    x = 418,573.91

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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.