Finding the Fourth Proportional to 388,372,344.87, 536,081,559.36 and 309,132,756.75
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Solution
The fourth proportional to 388,372,344.87, 536,081,559.36 and 309,132,756.75 is: 426,704,868.35
Step by Step Solution
- Step 1: Write the proportion equation
388,372,344.87 : 536,081,559.36 = 309,132,756.75 : x - Step 2: Convert to fraction form
388,372,344.87/536,081,559.36 = 309,132,756.75/x - Step 3: Cross multiply
388,372,344.87x = 536,081,559.36 × 309,132,756.75 - Step 4: Simplify right side
388,372,344.87x = 165,720,370,287,795,584 - Step 5: Solve for x
x = 165,720,370,287,795,584/388,372,344.87 - Step 6: Final answer
x = 426,704,868.35
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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.