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Finding the Fourth Proportional to 663,472,365.60, 995,208,548.40 and 422,204,858.40

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Solution

The fourth proportional to 663,472,365.60, 995,208,548.40 and 422,204,858.40 is: 633,307,287.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    663,472,365.60 : 995,208,548.40 = 422,204,858.40 : x
  2. Step 2: Convert to fraction form
    663,472,365.60/995,208,548.40 = 422,204,858.40/x
  3. Step 3: Cross multiply
    663,472,365.60x = 995,208,548.40 × 422,204,858.40
  4. Step 4: Simplify right side
    663,472,365.60x = 420,181,884,255,691,520
  5. Step 5: Solve for x
    x = 420,181,884,255,691,520/663,472,365.60
  6. Step 6: Final answer
    x = 633,307,287.60

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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.