Finding the Fourth Proportional to 831,638.80, 1,247,458.20 and 768,653.20
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Solution
The fourth proportional to 831,638.80, 1,247,458.20 and 768,653.20 is: 1,152,979.80
Step by Step Solution
- Step 1: Write the proportion equation
831,638.80 : 1,247,458.20 = 768,653.20 : x - Step 2: Convert to fraction form
831,638.80/1,247,458.20 = 768,653.20/x - Step 3: Cross multiply
831,638.80x = 1,247,458.20 × 768,653.20 - Step 4: Simplify right side
831,638.80x = 958,862,737,296.24 - Step 5: Solve for x
x = 958,862,737,296.24/831,638.80 - Step 6: Final answer
x = 1,152,979.80
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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.