Home / 378,105,766.16-521,795,183.71-210,840,394.88

Finding the Fourth Proportional to 378,105,766.16, 521,795,183.71 and 210,840,394.88

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Solution

The fourth proportional to 378,105,766.16, 521,795,183.71 and 210,840,394.88 is: 290,964,889.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    378,105,766.16 : 521,795,183.71 = 210,840,394.88 : x
  2. Step 2: Convert to fraction form
    378,105,766.16/521,795,183.71 = 210,840,394.88/x
  3. Step 3: Cross multiply
    378,105,766.16x = 521,795,183.71 × 210,840,394.88
  4. Step 4: Simplify right side
    378,105,766.16x = 110,015,502,576,235,360
  5. Step 5: Solve for x
    x = 110,015,502,576,235,360/378,105,766.16
  6. Step 6: Final answer
    x = 290,964,889.78

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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.