Home / 660,690,480.66-911,494,813.80-378,281,991.54

Finding the Fourth Proportional to 660,690,480.66, 911,494,813.80 and 378,281,991.54

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Solution

The fourth proportional to 660,690,480.66, 911,494,813.80 and 378,281,991.54 is: 521,881,400.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    660,690,480.66 : 911,494,813.80 = 378,281,991.54 : x
  2. Step 2: Convert to fraction form
    660,690,480.66/911,494,813.80 = 378,281,991.54/x
  3. Step 3: Cross multiply
    660,690,480.66x = 911,494,813.80 × 378,281,991.54
  4. Step 4: Simplify right side
    660,690,480.66x = 344,802,073,442,645,504
  5. Step 5: Solve for x
    x = 344,802,073,442,645,504/660,690,480.66
  6. Step 6: Final answer
    x = 521,881,400.65

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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.