Finding the Fourth Proportional to 1,241,186,141.80, 1,861,779,212.70 and 423,325,124.20
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Solution
The fourth proportional to 1,241,186,141.80, 1,861,779,212.70 and 423,325,124.20 is: 634,987,686.30
Step by Step Solution
- Step 1: Write the proportion equation
1,241,186,141.80 : 1,861,779,212.70 = 423,325,124.20 : x - Step 2: Convert to fraction form
1,241,186,141.80/1,861,779,212.70 = 423,325,124.20/x - Step 3: Cross multiply
1,241,186,141.80x = 1,861,779,212.70 × 423,325,124.20 - Step 4: Simplify right side
1,241,186,141.80x = 788,137,916,449,205,760 - Step 5: Solve for x
x = 788,137,916,449,205,760/1,241,186,141.80 - Step 6: Final answer
x = 634,987,686.30
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Double scale
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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.