Finding the Fourth Proportional to 631,918.80, 872,048.16 and 345,438.81
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Solution
The fourth proportional to 631,918.80, 872,048.16 and 345,438.81 is: 476,705.68
Step by Step Solution
- Step 1: Write the proportion equation
631,918.80 : 872,048.16 = 345,438.81 : x - Step 2: Convert to fraction form
631,918.80/872,048.16 = 345,438.81/x - Step 3: Cross multiply
631,918.80x = 872,048.16 × 345,438.81 - Step 4: Simplify right side
631,918.80x = 301,239,278,653.09 - Step 5: Solve for x
x = 301,239,278,653.09/631,918.80 - Step 6: Final answer
x = 476,705.68
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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.