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Finding the Fourth Proportional to 639,663.75, 959,500.49 and 218,943.27

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Solution

The fourth proportional to 639,663.75, 959,500.49 and 218,943.27 is: 328,416.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    639,663.75 : 959,500.49 = 218,943.27 : x
  2. Step 2: Convert to fraction form
    639,663.75/959,500.49 = 218,943.27/x
  3. Step 3: Cross multiply
    639,663.75x = 959,500.49 × 218,943.27
  4. Step 4: Simplify right side
    639,663.75x = 210,076,173,752.49
  5. Step 5: Solve for x
    x = 210,076,173,752.49/639,663.75
  6. Step 6: Final answer
    x = 328,416.57

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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.