Finding the Fourth Proportional to 749,959,778.97, 1,120,378,307.49 and 485,489,803.68
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Solution
The fourth proportional to 749,959,778.97, 1,120,378,307.49 and 485,489,803.68 is: 725,281,888.18
Step by Step Solution
- Step 1: Write the proportion equation
749,959,778.97 : 1,120,378,307.49 = 485,489,803.68 : x - Step 2: Convert to fraction form
749,959,778.97/1,120,378,307.49 = 485,489,803.68/x - Step 3: Cross multiply
749,959,778.97x = 1,120,378,307.49 × 485,489,803.68 - Step 4: Simplify right side
749,959,778.97x = 543,932,244,550,650,816 - Step 5: Solve for x
x = 543,932,244,550,650,816/749,959,778.97 - Step 6: Final answer
x = 725,281,888.18
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Double scale
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1.5x scale
Why These Related Problems?
These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.