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Finding the Fourth Proportional to 639,568.90, 959,094.15 and 218,628.10

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Solution

The fourth proportional to 639,568.90, 959,094.15 and 218,628.10 is: 327,853.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    639,568.90 : 959,094.15 = 218,628.10 : x
  2. Step 2: Convert to fraction form
    639,568.90/959,094.15 = 218,628.10/x
  3. Step 3: Cross multiply
    639,568.90x = 959,094.15 × 218,628.10
  4. Step 4: Simplify right side
    639,568.90x = 209,684,931,735.62
  5. Step 5: Solve for x
    x = 209,684,931,735.62/639,568.90
  6. Step 6: Final answer
    x = 327,853.55

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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.