Finding the Fourth Proportional to 687,705,163.20, 1,031,557,744.80 and 343,331,395.20
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Solution
The fourth proportional to 687,705,163.20, 1,031,557,744.80 and 343,331,395.20 is: 514,997,092.80
Step by Step Solution
- Step 1: Write the proportion equation
687,705,163.20 : 1,031,557,744.80 = 343,331,395.20 : x - Step 2: Convert to fraction form
687,705,163.20/1,031,557,744.80 = 343,331,395.20/x - Step 3: Cross multiply
687,705,163.20x = 1,031,557,744.80 × 343,331,395.20 - Step 4: Simplify right side
687,705,163.20x = 354,166,159,751,549,504 - Step 5: Solve for x
x = 354,166,159,751,549,504/687,705,163.20 - Step 6: Final answer
x = 514,997,092.80
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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.