Finding the Fourth Proportional to 643,081,643.54, 887,125,460.82 and 420,193,626.02
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Solution
The fourth proportional to 643,081,643.54, 887,125,460.82 and 420,193,626.02 is: 579,653,404.60
Step by Step Solution
- Step 1: Write the proportion equation
643,081,643.54 : 887,125,460.82 = 420,193,626.02 : x - Step 2: Convert to fraction form
643,081,643.54/887,125,460.82 = 420,193,626.02/x - Step 3: Cross multiply
643,081,643.54x = 887,125,460.82 × 420,193,626.02 - Step 4: Simplify right side
643,081,643.54x = 372,764,464,112,183,616 - Step 5: Solve for x
x = 372,764,464,112,183,616/643,081,643.54 - Step 6: Final answer
x = 579,653,404.60
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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.