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Finding the Fourth Proportional to 639,197.88, 959,224.50 and 265,220.88

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Solution

The fourth proportional to 639,197.88, 959,224.50 and 265,220.88 is: 398,008.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    639,197.88 : 959,224.50 = 265,220.88 : x
  2. Step 2: Convert to fraction form
    639,197.88/959,224.50 = 265,220.88/x
  3. Step 3: Cross multiply
    639,197.88x = 959,224.50 × 265,220.88
  4. Step 4: Simplify right side
    639,197.88x = 254,406,366,007.56
  5. Step 5: Solve for x
    x = 254,406,366,007.56/639,197.88
  6. Step 6: Final answer
    x = 398,008.78

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1.5x scale

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.