Home / 378,105,765.41-521,795,182.67-210,840,394.12

Finding the Fourth Proportional to 378,105,765.41, 521,795,182.67 and 210,840,394.12

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Solution

The fourth proportional to 378,105,765.41, 521,795,182.67 and 210,840,394.12 is: 290,964,888.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    378,105,765.41 : 521,795,182.67 = 210,840,394.12 : x
  2. Step 2: Convert to fraction form
    378,105,765.41/521,795,182.67 = 210,840,394.12/x
  3. Step 3: Cross multiply
    378,105,765.41x = 521,795,182.67 × 210,840,394.12
  4. Step 4: Simplify right side
    378,105,765.41x = 110,015,501,964,837,584
  5. Step 5: Solve for x
    x = 110,015,501,964,837,584/378,105,765.41
  6. Step 6: Final answer
    x = 290,964,888.74

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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.