Finding the Fourth Proportional to 811,689,787.80, 1,217,534,681.70 and 811,689,787.80
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Solution
The fourth proportional to 811,689,787.80, 1,217,534,681.70 and 811,689,787.80 is: 1,217,534,681.70
Step by Step Solution
- Step 1: Write the proportion equation
811,689,787.80 : 1,217,534,681.70 = 811,689,787.80 : x - Step 2: Convert to fraction form
811,689,787.80/1,217,534,681.70 = 811,689,787.80/x - Step 3: Cross multiply
811,689,787.80x = 1,217,534,681.70 × 811,689,787.80 - Step 4: Simplify right side
811,689,787.80x = 988,260,467,428,213,504 - Step 5: Solve for x
x = 988,260,467,428,213,504/811,689,787.80 - Step 6: Final answer
x = 1,217,534,681.70
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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.