Home / 378,323,836.03-521,623,057.72-311,107,898.01

Finding the Fourth Proportional to 378,323,836.03, 521,623,057.72 and 311,107,898.01

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Solution

The fourth proportional to 378,323,836.03, 521,623,057.72 and 311,107,898.01 is: 428,947,471.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    378,323,836.03 : 521,623,057.72 = 311,107,898.01 : x
  2. Step 2: Convert to fraction form
    378,323,836.03/521,623,057.72 = 311,107,898.01/x
  3. Step 3: Cross multiply
    378,323,836.03x = 521,623,057.72 × 311,107,898.01
  4. Step 4: Simplify right side
    378,323,836.03x = 162,281,053,040,818,112
  5. Step 5: Solve for x
    x = 162,281,053,040,818,112/378,323,836.03
  6. Step 6: Final answer
    x = 428,947,471.94

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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.