Finding the Fourth Proportional to 720,614,748.07, 994,449,817.70 and 390,590,110.63
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Solution
The fourth proportional to 720,614,748.07, 994,449,817.70 and 390,590,110.63 is: 539,015,146.93
Step by Step Solution
- Step 1: Write the proportion equation
720,614,748.07 : 994,449,817.70 = 390,590,110.63 : x - Step 2: Convert to fraction form
720,614,748.07/994,449,817.70 = 390,590,110.63/x - Step 3: Cross multiply
720,614,748.07x = 994,449,817.70 × 390,590,110.63 - Step 4: Simplify right side
720,614,748.07x = 388,422,264,311,426,368 - Step 5: Solve for x
x = 388,422,264,311,426,368/720,614,748.07 - Step 6: Final answer
x = 539,015,146.93
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1.5x scale
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.