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Finding the Fourth Proportional to 298,936,278.60, 448,404,417.90 and 137,378,214.60

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Solution

The fourth proportional to 298,936,278.60, 448,404,417.90 and 137,378,214.60 is: 206,067,321.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    298,936,278.60 : 448,404,417.90 = 137,378,214.60 : x
  2. Step 2: Convert to fraction form
    298,936,278.60/448,404,417.90 = 137,378,214.60/x
  3. Step 3: Cross multiply
    298,936,278.60x = 448,404,417.90 × 137,378,214.60
  4. Step 4: Simplify right side
    298,936,278.60x = 61,600,998,349,854,272
  5. Step 5: Solve for x
    x = 61,600,998,349,854,272/298,936,278.60
  6. Step 6: Final answer
    x = 206,067,321.90

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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.