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Finding the Fourth Proportional to 639,191.88, 959,215.50 and 265,214.88

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Solution

The fourth proportional to 639,191.88, 959,215.50 and 265,214.88 is: 397,999.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    639,191.88 : 959,215.50 = 265,214.88 : x
  2. Step 2: Convert to fraction form
    639,191.88/959,215.50 = 265,214.88/x
  3. Step 3: Cross multiply
    639,191.88x = 959,215.50 × 265,214.88
  4. Step 4: Simplify right side
    639,191.88x = 254,398,223,726.64
  5. Step 5: Solve for x
    x = 254,398,223,726.64/639,191.88
  6. Step 6: Final answer
    x = 397,999.77

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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.