Finding the Fourth Proportional to 718,559,837.82, 991,625,490.81 and 421,416,393.84
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Solution
The fourth proportional to 718,559,837.82, 991,625,490.81 and 421,416,393.84 is: 581,562,197.58
Step by Step Solution
- Step 1: Write the proportion equation
718,559,837.82 : 991,625,490.81 = 421,416,393.84 : x - Step 2: Convert to fraction form
718,559,837.82/991,625,490.81 = 421,416,393.84/x - Step 3: Cross multiply
718,559,837.82x = 991,625,490.81 × 421,416,393.84 - Step 4: Simplify right side
718,559,837.82x = 417,887,238,376,970,240 - Step 5: Solve for x
x = 417,887,238,376,970,240/718,559,837.82 - Step 6: Final answer
x = 581,562,197.58
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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.