Finding the Fourth Proportional to 693,128,613.93, 956,411,695.35 and 391,603,906.05
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Solution
The fourth proportional to 693,128,613.93, 956,411,695.35 and 391,603,906.05 is: 540,353,620.04
Step by Step Solution
- Step 1: Write the proportion equation
693,128,613.93 : 956,411,695.35 = 391,603,906.05 : x - Step 2: Convert to fraction form
693,128,613.93/956,411,695.35 = 391,603,906.05/x - Step 3: Cross multiply
693,128,613.93x = 956,411,695.35 × 391,603,906.05 - Step 4: Simplify right side
693,128,613.93x = 374,534,555,690,962,624 - Step 5: Solve for x
x = 374,534,555,690,962,624/693,128,613.93 - Step 6: Final answer
x = 540,353,620.04
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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.