Finding the Fourth Proportional to 391,529,195.10, 540,297,922.05 and 215,316,645.53
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Solution
The fourth proportional to 391,529,195.10, 540,297,922.05 and 215,316,645.53 is: 297,130,169.64
Step by Step Solution
- Step 1: Write the proportion equation
391,529,195.10 : 540,297,922.05 = 215,316,645.53 : x - Step 2: Convert to fraction form
391,529,195.10/540,297,922.05 = 215,316,645.53/x - Step 3: Cross multiply
391,529,195.10x = 540,297,922.05 × 215,316,645.53 - Step 4: Simplify right side
391,529,195.10x = 116,335,136,159,933,920 - Step 5: Solve for x
x = 116,335,136,159,933,920/391,529,195.10 - Step 6: Final answer
x = 297,130,169.64
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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.