Finding the Fourth Proportional to 687,702,997.40, 1,031,554,496.10 and 624,213,512.60
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Solution
The fourth proportional to 687,702,997.40, 1,031,554,496.10 and 624,213,512.60 is: 936,320,268.90
Step by Step Solution
- Step 1: Write the proportion equation
687,702,997.40 : 1,031,554,496.10 = 624,213,512.60 : x - Step 2: Convert to fraction form
687,702,997.40/1,031,554,496.10 = 624,213,512.60/x - Step 3: Cross multiply
687,702,997.40x = 1,031,554,496.10 × 624,213,512.60 - Step 4: Simplify right side
687,702,997.40x = 643,910,255,448,904,064 - Step 5: Solve for x
x = 643,910,255,448,904,064/687,702,997.40 - Step 6: Final answer
x = 936,320,268.90
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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.