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Finding the Fourth Proportional to 663,552,406.80, 995,328,610.20 and 659,521,328.40

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Solution

The fourth proportional to 663,552,406.80, 995,328,610.20 and 659,521,328.40 is: 989,281,992.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    663,552,406.80 : 995,328,610.20 = 659,521,328.40 : x
  2. Step 2: Convert to fraction form
    663,552,406.80/995,328,610.20 = 659,521,328.40/x
  3. Step 3: Cross multiply
    663,552,406.80x = 995,328,610.20 × 659,521,328.40
  4. Step 4: Simplify right side
    663,552,406.80x = 656,440,447,193,629,824
  5. Step 5: Solve for x
    x = 656,440,447,193,629,824/663,552,406.80
  6. Step 6: Final answer
    x = 989,281,992.60

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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.