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Finding the Fourth Proportional to 639,593.22, 959,376.53 and 213,159.94

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Solution

The fourth proportional to 639,593.22, 959,376.53 and 213,159.94 is: 319,735.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    639,593.22 : 959,376.53 = 213,159.94 : x
  2. Step 2: Convert to fraction form
    639,593.22/959,376.53 = 213,159.94/x
  3. Step 3: Cross multiply
    639,593.22x = 959,376.53 × 213,159.94
  4. Step 4: Simplify right side
    639,593.22x = 204,500,642,506.41
  5. Step 5: Solve for x
    x = 204,500,642,506.41/639,593.22
  6. Step 6: Final answer
    x = 319,735.48

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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.