Finding the Fourth Proportional to 709,361.21, 978,942.11 and 387,088.99
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Solution
The fourth proportional to 709,361.21, 978,942.11 and 387,088.99 is: 534,195.71
Step by Step Solution
- Step 1: Write the proportion equation
709,361.21 : 978,942.11 = 387,088.99 : x - Step 2: Convert to fraction form
709,361.21/978,942.11 = 387,088.99/x - Step 3: Cross multiply
709,361.21x = 978,942.11 × 387,088.99 - Step 4: Simplify right side
709,361.21x = 378,937,713,752.12 - Step 5: Solve for x
x = 378,937,713,752.12/709,361.21 - Step 6: Final answer
x = 534,195.71
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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.