Finding the Fourth Proportional to 644,305,195.68, 889,116,143.76 and 393,828,971.40
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Solution
The fourth proportional to 644,305,195.68, 889,116,143.76 and 393,828,971.40 is: 543,468,683.32
Step by Step Solution
- Step 1: Write the proportion equation
644,305,195.68 : 889,116,143.76 = 393,828,971.40 : x - Step 2: Convert to fraction form
644,305,195.68/889,116,143.76 = 393,828,971.40/x - Step 3: Cross multiply
644,305,195.68x = 889,116,143.76 × 393,828,971.40 - Step 4: Simplify right side
644,305,195.68x = 350,159,696,352,135,296 - Step 5: Solve for x
x = 350,159,696,352,135,296/644,305,195.68 - Step 6: Final answer
x = 543,468,683.32
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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.