Home / 378,105,764.76-521,795,181.68-210,840,393.38

Finding the Fourth Proportional to 378,105,764.76, 521,795,181.68 and 210,840,393.38

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Solution

The fourth proportional to 378,105,764.76, 521,795,181.68 and 210,840,393.38 is: 290,964,887.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    378,105,764.76 : 521,795,181.68 = 210,840,393.38 : x
  2. Step 2: Convert to fraction form
    378,105,764.76/521,795,181.68 = 210,840,393.38/x
  3. Step 3: Cross multiply
    378,105,764.76x = 521,795,181.68 × 210,840,393.38
  4. Step 4: Simplify right side
    378,105,764.76x = 110,015,501,369,199,776
  5. Step 5: Solve for x
    x = 110,015,501,369,199,776/378,105,764.76
  6. Step 6: Final answer
    x = 290,964,887.67

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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.