Finding the Fourth Proportional to 664,469,315.80, 996,703,973.70 and 392,371,523.80
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Solution
The fourth proportional to 664,469,315.80, 996,703,973.70 and 392,371,523.80 is: 588,557,285.70
Step by Step Solution
- Step 1: Write the proportion equation
664,469,315.80 : 996,703,973.70 = 392,371,523.80 : x - Step 2: Convert to fraction form
664,469,315.80/996,703,973.70 = 392,371,523.80/x - Step 3: Cross multiply
664,469,315.80x = 996,703,973.70 × 392,371,523.80 - Step 4: Simplify right side
664,469,315.80x = 391,078,256,938,184,128 - Step 5: Solve for x
x = 391,078,256,938,184,128/664,469,315.80 - Step 6: Final answer
x = 588,557,285.70
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Double scale
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Similar ratio
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1.5x scale
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.