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Finding the Fourth Proportional to 206,615,216.80, 309,922,825.20 and 206,615,216.80

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Solution

The fourth proportional to 206,615,216.80, 309,922,825.20 and 206,615,216.80 is: 309,922,825.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    206,615,216.80 : 309,922,825.20 = 206,615,216.80 : x
  2. Step 2: Convert to fraction form
    206,615,216.80/309,922,825.20 = 206,615,216.80/x
  3. Step 3: Cross multiply
    206,615,216.80x = 309,922,825.20 × 206,615,216.80
  4. Step 4: Simplify right side
    206,615,216.80x = 64,034,771,719,966,504
  5. Step 5: Solve for x
    x = 64,034,771,719,966,504/206,615,216.80
  6. Step 6: Final answer
    x = 309,922,825.20

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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.