Home / 378,105,760.76-521,795,176.16-210,840,389.37

Finding the Fourth Proportional to 378,105,760.76, 521,795,176.16 and 210,840,389.37

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Solution

The fourth proportional to 378,105,760.76, 521,795,176.16 and 210,840,389.37 is: 290,964,882.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    378,105,760.76 : 521,795,176.16 = 210,840,389.37 : x
  2. Step 2: Convert to fraction form
    378,105,760.76/521,795,176.16 = 210,840,389.37/x
  3. Step 3: Cross multiply
    378,105,760.76x = 521,795,176.16 × 210,840,389.37
  4. Step 4: Simplify right side
    378,105,760.76x = 110,015,498,111,907,936
  5. Step 5: Solve for x
    x = 110,015,498,111,907,936/378,105,760.76
  6. Step 6: Final answer
    x = 290,964,882.13

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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.