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Finding the Fourth Proportional to 663,713,999.80, 995,570,999.70 and 663,713,999.80

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Solution

The fourth proportional to 663,713,999.80, 995,570,999.70 and 663,713,999.80 is: 995,570,999.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    663,713,999.80 : 995,570,999.70 = 663,713,999.80 : x
  2. Step 2: Convert to fraction form
    663,713,999.80/995,570,999.70 = 663,713,999.80/x
  3. Step 3: Cross multiply
    663,713,999.80x = 995,570,999.70 × 663,713,999.80
  4. Step 4: Simplify right side
    663,713,999.80x = 660,774,410,295,771,648
  5. Step 5: Solve for x
    x = 660,774,410,295,771,648/663,713,999.80
  6. Step 6: Final answer
    x = 995,570,999.70

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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.