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Finding the Fourth Proportional to 663,552,375.70, 995,328,563.55 and 421,488,606.10

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Solution

The fourth proportional to 663,552,375.70, 995,328,563.55 and 421,488,606.10 is: 632,232,909.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    663,552,375.70 : 995,328,563.55 = 421,488,606.10 : x
  2. Step 2: Convert to fraction form
    663,552,375.70/995,328,563.55 = 421,488,606.10/x
  3. Step 3: Cross multiply
    663,552,375.70x = 995,328,563.55 × 421,488,606.10
  4. Step 4: Simplify right side
    663,552,375.70x = 419,519,648,862,204,800
  5. Step 5: Solve for x
    x = 419,519,648,862,204,800/663,552,375.70
  6. Step 6: Final answer
    x = 632,232,909.15

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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.