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Finding the Fourth Proportional to 639,570.90, 959,097.15 and 218,630.10

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Solution

The fourth proportional to 639,570.90, 959,097.15 and 218,630.10 is: 327,856.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    639,570.90 : 959,097.15 = 218,630.10 : x
  2. Step 2: Convert to fraction form
    639,570.90/959,097.15 = 218,630.10/x
  3. Step 3: Cross multiply
    639,570.90x = 959,097.15 × 218,630.10
  4. Step 4: Simplify right side
    639,570.90x = 209,687,505,814.22
  5. Step 5: Solve for x
    x = 209,687,505,814.22/639,570.90
  6. Step 6: Final answer
    x = 327,856.55

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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.