Home / 729,491,654.38-1,006,697,152.22-394,964,135.81

Finding the Fourth Proportional to 729,491,654.38, 1,006,697,152.22 and 394,964,135.81

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Solution

The fourth proportional to 729,491,654.38, 1,006,697,152.22 and 394,964,135.81 is: 545,049,786.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    729,491,654.38 : 1,006,697,152.22 = 394,964,135.81 : x
  2. Step 2: Convert to fraction form
    729,491,654.38/1,006,697,152.22 = 394,964,135.81/x
  3. Step 3: Cross multiply
    729,491,654.38x = 1,006,697,152.22 × 394,964,135.81
  4. Step 4: Simplify right side
    729,491,654.38x = 397,609,270,749,502,272
  5. Step 5: Solve for x
    x = 397,609,270,749,502,272/729,491,654.38
  6. Step 6: Final answer
    x = 545,049,786.88

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Double scale
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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.