Finding the Fourth Proportional to 398,944,455.80, 598,416,683.70 and 389,986,503.80
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Solution
The fourth proportional to 398,944,455.80, 598,416,683.70 and 389,986,503.80 is: 584,979,755.70
Step by Step Solution
- Step 1: Write the proportion equation
398,944,455.80 : 598,416,683.70 = 389,986,503.80 : x - Step 2: Convert to fraction form
398,944,455.80/598,416,683.70 = 389,986,503.80/x - Step 3: Cross multiply
398,944,455.80x = 598,416,683.70 × 389,986,503.80 - Step 4: Simplify right side
398,944,455.80x = 233,374,430,291,753,472 - Step 5: Solve for x
x = 233,374,430,291,753,472/398,944,455.80 - Step 6: Final answer
x = 584,979,755.70
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Why These Related Problems?
These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.