Finding the Fourth Proportional to 1,190,339.40, 1,642,929.91 and 782,478.91
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Solution
The fourth proportional to 1,190,339.40, 1,642,929.91 and 782,478.91 is: 1,079,992.81
Step by Step Solution
- Step 1: Write the proportion equation
1,190,339.40 : 1,642,929.91 = 782,478.91 : x - Step 2: Convert to fraction form
1,190,339.40/1,642,929.91 = 782,478.91/x - Step 3: Cross multiply
1,190,339.40x = 1,642,929.91 × 782,478.91 - Step 4: Simplify right side
1,190,339.40x = 1,285,557,999,119.68 - Step 5: Solve for x
x = 1,285,557,999,119.68/1,190,339.40 - Step 6: Final answer
x = 1,079,992.81
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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.