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Finding the Fourth Proportional to 643,227.20, 965,877.60 and 485,633.60

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Solution

The fourth proportional to 643,227.20, 965,877.60 and 485,633.60 is: 729,233.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    643,227.20 : 965,877.60 = 485,633.60 : x
  2. Step 2: Convert to fraction form
    643,227.20/965,877.60 = 485,633.60/x
  3. Step 3: Cross multiply
    643,227.20x = 965,877.60 × 485,633.60
  4. Step 4: Simplify right side
    643,227.20x = 469,062,616,047.36
  5. Step 5: Solve for x
    x = 469,062,616,047.36/643,227.20
  6. Step 6: Final answer
    x = 729,233.18

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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.