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Finding the Fourth Proportional to 640,033.48, 959,776.62 and 219,351.88

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Solution

The fourth proportional to 640,033.48, 959,776.62 and 219,351.88 is: 328,934.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    640,033.48 : 959,776.62 = 219,351.88 : x
  2. Step 2: Convert to fraction form
    640,033.48/959,776.62 = 219,351.88/x
  3. Step 3: Cross multiply
    640,033.48x = 959,776.62 × 219,351.88
  4. Step 4: Simplify right side
    640,033.48x = 210,528,805,977.05
  5. Step 5: Solve for x
    x = 210,528,805,977.05/640,033.48
  6. Step 6: Final answer
    x = 328,934.05

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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.