Finding the Fourth Proportional to 777,412,721.40, 1,067,118,930.62 and 687,333,471.90
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Solution
The fourth proportional to 777,412,721.40, 1,067,118,930.62 and 687,333,471.90 is: 943,471,259.63
Step by Step Solution
- Step 1: Write the proportion equation
777,412,721.40 : 1,067,118,930.62 = 687,333,471.90 : x - Step 2: Convert to fraction form
777,412,721.40/1,067,118,930.62 = 687,333,471.90/x - Step 3: Cross multiply
777,412,721.40x = 1,067,118,930.62 × 687,333,471.90 - Step 4: Simplify right side
777,412,721.40x = 733,466,559,509,823,104 - Step 5: Solve for x
x = 733,466,559,509,823,104/777,412,721.40 - Step 6: Final answer
x = 943,471,259.63
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1.5x scale
Why These Related Problems?
These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.