Finding the Fourth Proportional to 721,573,637.12, 995,774,350.26 and 391,548,776.12
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Solution
The fourth proportional to 721,573,637.12, 995,774,350.26 and 391,548,776.12 is: 540,338,792.99
Step by Step Solution
- Step 1: Write the proportion equation
721,573,637.12 : 995,774,350.26 = 391,548,776.12 : x - Step 2: Convert to fraction form
721,573,637.12/995,774,350.26 = 391,548,776.12/x - Step 3: Cross multiply
721,573,637.12x = 995,774,350.26 × 391,548,776.12 - Step 4: Simplify right side
721,573,637.12x = 389,894,228,135,991,232 - Step 5: Solve for x
x = 389,894,228,135,991,232/721,573,637.12 - Step 6: Final answer
x = 540,338,792.99
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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.