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Finding the Fourth Proportional to 663,552,885.60, 995,329,328.40 and 422,285,378.40

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Solution

The fourth proportional to 663,552,885.60, 995,329,328.40 and 422,285,378.40 is: 633,428,067.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    663,552,885.60 : 995,329,328.40 = 422,285,378.40 : x
  2. Step 2: Convert to fraction form
    663,552,885.60/995,329,328.40 = 422,285,378.40/x
  3. Step 3: Cross multiply
    663,552,885.60x = 995,329,328.40 × 422,285,378.40
  4. Step 4: Simplify right side
    663,552,885.60x = 420,313,022,076,011,840
  5. Step 5: Solve for x
    x = 420,313,022,076,011,840/663,552,885.60
  6. Step 6: Final answer
    x = 633,428,067.60

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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.