Finding the Fourth Proportional to 644,308,066.62, 889,120,102.56 and 393,831,841.08
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Solution
The fourth proportional to 644,308,066.62, 889,120,102.56 and 393,831,841.08 is: 543,472,641.54
Step by Step Solution
- Step 1: Write the proportion equation
644,308,066.62 : 889,120,102.56 = 393,831,841.08 : x - Step 2: Convert to fraction form
644,308,066.62/889,120,102.56 = 393,831,841.08/x - Step 3: Cross multiply
644,308,066.62x = 889,120,102.56 × 393,831,841.08 - Step 4: Simplify right side
644,308,066.62x = 350,163,806,932,443,200 - Step 5: Solve for x
x = 350,163,806,932,443,200/644,308,066.62 - Step 6: Final answer
x = 543,472,641.54
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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.