Finding the Fourth Proportional to 838,657,611.20, 1,257,986,416.80 and 690,704,436.80
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Solution
The fourth proportional to 838,657,611.20, 1,257,986,416.80 and 690,704,436.80 is: 1,036,056,655.20
Step by Step Solution
- Step 1: Write the proportion equation
838,657,611.20 : 1,257,986,416.80 = 690,704,436.80 : x - Step 2: Convert to fraction form
838,657,611.20/1,257,986,416.80 = 690,704,436.80/x - Step 3: Cross multiply
838,657,611.20x = 1,257,986,416.80 × 690,704,436.80 - Step 4: Simplify right side
838,657,611.20x = 868,896,799,517,894,016 - Step 5: Solve for x
x = 868,896,799,517,894,016/838,657,611.20 - Step 6: Final answer
x = 1,036,056,655.20
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1.5x scale
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.