Finding the Fourth Proportional to 1,389,330.84, 1,917,357.36 and 777,478.32
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Solution
The fourth proportional to 1,389,330.84, 1,917,357.36 and 777,478.32 is: 1,072,965.30
Step by Step Solution
- Step 1: Write the proportion equation
1,389,330.84 : 1,917,357.36 = 777,478.32 : x - Step 2: Convert to fraction form
1,389,330.84/1,917,357.36 = 777,478.32/x - Step 3: Cross multiply
1,389,330.84x = 1,917,357.36 × 777,478.32 - Step 4: Simplify right side
1,389,330.84x = 1,490,703,779,092.44 - Step 5: Solve for x
x = 1,490,703,779,092.44/1,389,330.84 - Step 6: Final answer
x = 1,072,965.30
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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.