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Finding the Fourth Proportional to 279,939,794.40, 419,909,691.60 and 251,722,245.60

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Solution

The fourth proportional to 279,939,794.40, 419,909,691.60 and 251,722,245.60 is: 377,583,368.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,939,794.40 : 419,909,691.60 = 251,722,245.60 : x
  2. Step 2: Convert to fraction form
    279,939,794.40/419,909,691.60 = 251,722,245.60/x
  3. Step 3: Cross multiply
    279,939,794.40x = 419,909,691.60 × 251,722,245.60
  4. Step 4: Simplify right side
    279,939,794.40x = 105,700,610,518,755,456
  5. Step 5: Solve for x
    x = 105,700,610,518,755,456/279,939,794.40
  6. Step 6: Final answer
    x = 377,583,368.40

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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.