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Finding the Fourth Proportional to 419,909,385.60, 629,864,078.40 and 419,909,385.60

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Solution

The fourth proportional to 419,909,385.60, 629,864,078.40 and 419,909,385.60 is: 629,864,078.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    419,909,385.60 : 629,864,078.40 = 419,909,385.60 : x
  2. Step 2: Convert to fraction form
    419,909,385.60/629,864,078.40 = 419,909,385.60/x
  3. Step 3: Cross multiply
    419,909,385.60x = 629,864,078.40 × 419,909,385.60
  4. Step 4: Simplify right side
    419,909,385.60x = 264,485,838,172,454,240
  5. Step 5: Solve for x
    x = 264,485,838,172,454,240/419,909,385.60
  6. Step 6: Final answer
    x = 629,864,078.40

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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.