Finding the Fourth Proportional to 842,116.40, 1,161,991.80 and 479,555.12
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Solution
The fourth proportional to 842,116.40, 1,161,991.80 and 479,555.12 is: 661,712.70
Step by Step Solution
- Step 1: Write the proportion equation
842,116.40 : 1,161,991.80 = 479,555.12 : x - Step 2: Convert to fraction form
842,116.40/1,161,991.80 = 479,555.12/x - Step 3: Cross multiply
842,116.40x = 1,161,991.80 × 479,555.12 - Step 4: Simplify right side
842,116.40x = 557,239,117,088.02 - Step 5: Solve for x
x = 557,239,117,088.02/842,116.40 - Step 6: Final answer
x = 661,712.70
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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.