Finding the Fourth Proportional to 509,305,079.70, 763,957,619.55 and 509,305,079.70
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Solution
The fourth proportional to 509,305,079.70, 763,957,619.55 and 509,305,079.70 is: 763,957,619.55
Step by Step Solution
- Step 1: Write the proportion equation
509,305,079.70 : 763,957,619.55 = 509,305,079.70 : x - Step 2: Convert to fraction form
509,305,079.70/763,957,619.55 = 509,305,079.70/x - Step 3: Cross multiply
509,305,079.70x = 763,957,619.55 × 509,305,079.70 - Step 4: Simplify right side
509,305,079.70x = 389,087,496,312,334,976 - Step 5: Solve for x
x = 389,087,496,312,334,976/509,305,079.70 - Step 6: Final answer
x = 763,957,619.55
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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.