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Finding the Fourth Proportional to 639,615.86, 959,423.66 and 190,343.15

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Solution

The fourth proportional to 639,615.86, 959,423.66 and 190,343.15 is: 285,514.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    639,615.86 : 959,423.66 = 190,343.15 : x
  2. Step 2: Convert to fraction form
    639,615.86/959,423.66 = 190,343.15/x
  3. Step 3: Cross multiply
    639,615.86x = 959,423.66 × 190,343.15
  4. Step 4: Simplify right side
    639,615.86x = 182,619,720,677.21
  5. Step 5: Solve for x
    x = 182,619,720,677.21/639,615.86
  6. Step 6: Final answer
    x = 285,514.68

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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.