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Finding the Fourth Proportional to 659,651,376.60, 989,589,039.30 and 199,585,891.80

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Solution

The fourth proportional to 659,651,376.60, 989,589,039.30 and 199,585,891.80 is: 299,412,716.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    659,651,376.60 : 989,589,039.30 = 199,585,891.80 : x
  2. Step 2: Convert to fraction form
    659,651,376.60/989,589,039.30 = 199,585,891.80/x
  3. Step 3: Cross multiply
    659,651,376.60x = 989,589,039.30 × 199,585,891.80
  4. Step 4: Simplify right side
    659,651,376.60x = 197,508,010,924,195,744
  5. Step 5: Solve for x
    x = 197,508,010,924,195,744/659,651,376.60
  6. Step 6: Final answer
    x = 299,412,716.98

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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.