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Finding the Fourth Proportional to 479,101,211.80, 718,651,817.70 and 206,471,978.80

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Solution

The fourth proportional to 479,101,211.80, 718,651,817.70 and 206,471,978.80 is: 309,707,968.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    479,101,211.80 : 718,651,817.70 = 206,471,978.80 : x
  2. Step 2: Convert to fraction form
    479,101,211.80/718,651,817.70 = 206,471,978.80/x
  3. Step 3: Cross multiply
    479,101,211.80x = 718,651,817.70 × 206,471,978.80
  4. Step 4: Simplify right side
    479,101,211.80x = 148,381,462,868,735,872
  5. Step 5: Solve for x
    x = 148,381,462,868,735,872/479,101,211.80
  6. Step 6: Final answer
    x = 309,707,968.20

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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.