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Finding the Fourth Proportional to 639,679.07, 878,118.82 and 633,701.27

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Solution

The fourth proportional to 639,679.07, 878,118.82 and 633,701.27 is: 869,912.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    639,679.07 : 878,118.82 = 633,701.27 : x
  2. Step 2: Convert to fraction form
    639,679.07/878,118.82 = 633,701.27/x
  3. Step 3: Cross multiply
    639,679.07x = 878,118.82 × 633,701.27
  4. Step 4: Simplify right side
    639,679.07x = 556,465,015,620.52
  5. Step 5: Solve for x
    x = 556,465,015,620.52/639,679.07
  6. Step 6: Final answer
    x = 869,912.80

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.