Finding the Fourth Proportional to 427,173,813.70, 640,760,720.55 and 427,173,813.70
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Solution
The fourth proportional to 427,173,813.70, 640,760,720.55 and 427,173,813.70 is: 640,760,720.55
Step by Step Solution
- Step 1: Write the proportion equation
427,173,813.70 : 640,760,720.55 = 427,173,813.70 : x - Step 2: Convert to fraction form
427,173,813.70/640,760,720.55 = 427,173,813.70/x - Step 3: Cross multiply
427,173,813.70x = 640,760,720.55 × 427,173,813.70 - Step 4: Simplify right side
427,173,813.70x = 273,716,200,666,503,424 - Step 5: Solve for x
x = 273,716,200,666,503,424/427,173,813.70 - Step 6: Final answer
x = 640,760,720.55
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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.