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Finding the Fourth Proportional to 618,366,907.60, 927,550,361.40 and 521,511,785.35

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Solution

The fourth proportional to 618,366,907.60, 927,550,361.40 and 521,511,785.35 is: 782,267,678.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    618,366,907.60 : 927,550,361.40 = 521,511,785.35 : x
  2. Step 2: Convert to fraction form
    618,366,907.60/927,550,361.40 = 521,511,785.35/x
  3. Step 3: Cross multiply
    618,366,907.60x = 927,550,361.40 × 521,511,785.35
  4. Step 4: Simplify right side
    618,366,907.60x = 483,728,444,975,751,744
  5. Step 5: Solve for x
    x = 483,728,444,975,751,744/618,366,907.60
  6. Step 6: Final answer
    x = 782,267,678.03

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.