Finding the Fourth Proportional to 1,261,121.25, 1,740,330.99 and 688,151.55
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Solution
The fourth proportional to 1,261,121.25, 1,740,330.99 and 688,151.55 is: 949,640.23
Step by Step Solution
- Step 1: Write the proportion equation
1,261,121.25 : 1,740,330.99 = 688,151.55 : x - Step 2: Convert to fraction form
1,261,121.25/1,740,330.99 = 688,151.55/x - Step 3: Cross multiply
1,261,121.25x = 1,740,330.99 × 688,151.55 - Step 4: Simplify right side
1,261,121.25x = 1,197,611,466,953.84 - Step 5: Solve for x
x = 1,197,611,466,953.84/1,261,121.25 - Step 6: Final answer
x = 949,640.23
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1.5x scale
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.