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Finding the Fourth Proportional to 640,974.62, 961,181.43 and 304,111.31

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Solution

The fourth proportional to 640,974.62, 961,181.43 and 304,111.31 is: 456,033.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    640,974.62 : 961,181.43 = 304,111.31 : x
  2. Step 2: Convert to fraction form
    640,974.62/961,181.43 = 304,111.31/x
  3. Step 3: Cross multiply
    640,974.62x = 961,181.43 × 304,111.31
  4. Step 4: Simplify right side
    640,974.62x = 292,306,143,824.97
  5. Step 5: Solve for x
    x = 292,306,143,824.97/640,974.62
  6. Step 6: Final answer
    x = 456,033.88

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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.