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Finding the Fourth Proportional to 408,860,903.70, 613,291,355.55 and 190,438,652.70

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Solution

The fourth proportional to 408,860,903.70, 613,291,355.55 and 190,438,652.70 is: 285,657,979.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    408,860,903.70 : 613,291,355.55 = 190,438,652.70 : x
  2. Step 2: Convert to fraction form
    408,860,903.70/613,291,355.55 = 190,438,652.70/x
  3. Step 3: Cross multiply
    408,860,903.70x = 613,291,355.55 × 190,438,652.70
  4. Step 4: Simplify right side
    408,860,903.70x = 116,794,379,463,498,656
  5. Step 5: Solve for x
    x = 116,794,379,463,498,656/408,860,903.70
  6. Step 6: Final answer
    x = 285,657,979.05

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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.