Home / 378,323,837.03-521,623,059.10-311,107,899.01

Finding the Fourth Proportional to 378,323,837.03, 521,623,059.10 and 311,107,899.01

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Solution

The fourth proportional to 378,323,837.03, 521,623,059.10 and 311,107,899.01 is: 428,947,473.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    378,323,837.03 : 521,623,059.10 = 311,107,899.01 : x
  2. Step 2: Convert to fraction form
    378,323,837.03/521,623,059.10 = 311,107,899.01/x
  3. Step 3: Cross multiply
    378,323,837.03x = 521,623,059.10 × 311,107,899.01
  4. Step 4: Simplify right side
    378,323,837.03x = 162,281,053,991,770,048
  5. Step 5: Solve for x
    x = 162,281,053,991,770,048/378,323,837.03
  6. Step 6: Final answer
    x = 428,947,473.32

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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.