Finding the Fourth Proportional to 745,206,990.05, 1,028,389,691.36 and 427,641,949.91
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Solution
The fourth proportional to 745,206,990.05, 1,028,389,691.36 and 427,641,949.91 is: 590,148,212.18
Step by Step Solution
- Step 1: Write the proportion equation
745,206,990.05 : 1,028,389,691.36 = 427,641,949.91 : x - Step 2: Convert to fraction form
745,206,990.05/1,028,389,691.36 = 427,641,949.91/x - Step 3: Cross multiply
745,206,990.05x = 1,028,389,691.36 × 427,641,949.91 - Step 4: Simplify right side
745,206,990.05x = 439,782,572,884,173,568 - Step 5: Solve for x
x = 439,782,572,884,173,568/745,206,990.05 - Step 6: Final answer
x = 590,148,212.18
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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.