Finding the Fourth Proportional to 394,599,869.40, 553,346,809.80 and 394,599,869.40
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Solution
The fourth proportional to 394,599,869.40, 553,346,809.80 and 394,599,869.40 is: 553,346,809.80
Step by Step Solution
- Step 1: Write the proportion equation
394,599,869.40 : 553,346,809.80 = 394,599,869.40 : x - Step 2: Convert to fraction form
394,599,869.40/553,346,809.80 = 394,599,869.40/x - Step 3: Cross multiply
394,599,869.40x = 553,346,809.80 × 394,599,869.40 - Step 4: Simplify right side
394,599,869.40x = 218,350,578,879,986,624 - Step 5: Solve for x
x = 218,350,578,879,986,624/394,599,869.40 - Step 6: Final answer
x = 553,346,809.80
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Why These Related Problems?
These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.