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Finding the Fourth Proportional to 643,735.20, 965,775.60 and 574,096.80

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Solution

The fourth proportional to 643,735.20, 965,775.60 and 574,096.80 is: 861,299.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    643,735.20 : 965,775.60 = 574,096.80 : x
  2. Step 2: Convert to fraction form
    643,735.20/965,775.60 = 574,096.80/x
  3. Step 3: Cross multiply
    643,735.20x = 965,775.60 × 574,096.80
  4. Step 4: Simplify right side
    643,735.20x = 554,448,681,478.08
  5. Step 5: Solve for x
    x = 554,448,681,478.08/643,735.20
  6. Step 6: Final answer
    x = 861,299.31

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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.