Finding the Fourth Proportional to 1,212,121.60, 1,672,753.12 and 668,280.31
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Solution
The fourth proportional to 1,212,121.60, 1,672,753.12 and 668,280.31 is: 922,240.78
Step by Step Solution
- Step 1: Write the proportion equation
1,212,121.60 : 1,672,753.12 = 668,280.31 : x - Step 2: Convert to fraction form
1,212,121.60/1,672,753.12 = 668,280.31/x - Step 3: Cross multiply
1,212,121.60x = 1,672,753.12 × 668,280.31 - Step 4: Simplify right side
1,212,121.60x = 1,117,867,973,587.07 - Step 5: Solve for x
x = 1,117,867,973,587.07/1,212,121.60 - Step 6: Final answer
x = 922,240.78
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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.